I don't have a Solarforce, but they look identical to the G&P, which I do have.
Lighthound has the Solarforce non-crenelated bezel for $12, and crenelated for $9. The G&P is $13, and includes both crenelated and non-crenelated retaining rings.
Some differences vs. a SureFire anti-roll 6P bezel:
- SureFire uses a polymer retaining ring. The G&P uses metal (probably aluminum) retaining ring for the non-crenelated (the metal crenelated ring is its own retaining ring).
- SureFire window is AR coated Pyrex. IIRC, light transmission is something like 98%. G&P window is some unknown quality glass window.
- SureFire bezel has a metal lip on which the rim of the lamp reflector sits. Thus, the lamp does not press against the glass window. In contrast, there is no metal lip for the G&P. To mimic this lip, G&P includes a metal spacer ring. If you don't use this ring, the lamp sits presses directly on the window. If you do use the spacer ring, the lamp presses on the ring which presses against the window. The ring is also unsecured and can fall out if you have to unscrew the bezel for some reason. Some LED drop-ins work better with the ring. Others don't need the ring or even leave a gap between the bezel and flashlight body if you use the ring.