Tacfit aren't getting rid of the original rubber coated model anytime soon. At least that's what they told me the other month when enquiring about the availability of the 10lbs model. They told me it would take at least 8 weeks for their manufacturer to make a new batch.
If you're in the US and you can't wait, you can email them to check if they have the weight you want in their warehouse. But it won't be as cheap as Amazon because you'll have to cover shipping. They found a 10lbs for me, but shipping to UK was more than the club itself so I passed.
Check out this review on the new generation model, it's what made me decide against it that model with it slipping out of his hand. .
I've been glad I got the rubber coated model because a couple of times in the beginning I'd hit myself when trying moves I wasn't ready for. It still hurt, but not as much as if it was solid metal. And it definitely protects the wooden floor when setting it down.
When I initially tried the 15lb two-handed I thought it was heavy. But then I bought a few maces and suddenly the 15lbs was light for two-hands, and soon found myself buying the 20lbs and 25lbs clubs. Actually, just playing with 360s with maces is what led to me being able to shield cast the 15lbs one-handed. So depending on what you want to do, you could consider a mace while you wait for the club weight you want. Could even choke up on the handle if you really want to do inside and outside circles.
This is an old video and NEITHER of the models shown in the video is still in production.
A little history on the Rmax/Tacfit/CST clubbells:
The first generation of clubbells was made in the USA by Torque Athletic. These had the urethane coating and the handles had a relatively smooth coating with no knurling. I have several of these, and a lot of experience with them.
The next generation used the same urethane-coated pattern, but was made in China and the handles had a slightly rougher coating (but not knurled). I also have several of these, and a lot of experience with them.
Then they came out with a separate line of clubbells labelled "Tacfit" (the ones shown in the video), and the existing urethane-coated clubbells were referred to as "CST" (which also refers generally to the Rmax system of Circular Strength Training). These new "Tacfit" clubbells had no urethane coating, came in kilogram increments, and had knurled handles (which John Sifferman in the video found problematic). I have never handled one of the "Tacfit" clubbells so I have no opinion about them, and they are no longer sold anyway.
At some point after Rmax dropped the "Tacfit" model, they started producing the original pattern with a knurled grip. The original pattern clubbells in the video are the older ones WITHOUT knurling, but any of the urethane coated ones you get now would have knurled handles. I have not personally handled this iteration.
Recently Rmax came out with a new "new generation" line. This line seems somewhat similar to the short-lived "Tacfit" clubbells, kilogram increments, with no urethane coating and knurled handles, although they have an integrated pommel and not a separate bolted-on knob. I have one of these and don't find the knurling problematic at all. In fact, I prefer it. Since I have no experience with the previous "Tacfit" knurling or the current urethane-coated knurling, I don't know how they all compare, but I like the current new generation knurling just fine.
Both types of the older non-knurled coated handles are too smooth for my taste (John Sifferman complains about them in the video too) and don't have a good grip, even with chalk. I eventually started wrapping the handles of my older clubbells with gaffer's tape, which does provide a decent grip and works well with chalk. Gaffer's tape also peels off cleanly without leaving a residue so it's easy to replace it when necessary.
To me, the current new generation knurling (which may be the same as the current urethane-coated knurling if they are both current production) is a big improvement. I still use chalk with it, but I don't have to tape it like I do with the old smoother coated handles.