Feeling the need for a clip on just about every light I have, I tried the Solarforce clip on my UF-2100 and the virtually identical Yezl Z1X and it works quite well. I love these lights, but without a clip they don't get used as much as they should. The ring sticks out a little from the body of the light, but it fits solidly and the light functions nicely. If someone else posted this already, I apologize.
The 2100 is slightly thinner than a Solarforce, I'd guess about 2mm just eyeballing it. The only thing I don't like is that I had just ordered this and another to use on my L2P and L2...darn, I have to make another order from SF
Solarforce does not only have a bad selection of clips, they are also on the expensive side...
No deep-carry clip available... Two-way-clip available only from eBay...
I have been thinking of starting to make my own.
I have in theory access to laser burning, if I could get a sketch of a clip frame with measurements, I probably could supply some straight, un-bended clips for people to twist in angle they like.
SS sheet is not THAT expensive per clip, I could also get it with buy-in prices.
Problem is, I bet the need for these is very limited and the other problem is, that the finish on these would most likely be not as great as in original ones.