Another option to make the reflector more OP would be to take sandpaper to it. The coarser teh sandpaper, the more OP like I would guess. Disclaimer, I’ve never tried this, just speculating. Only downside is that it is not removable like the DC fix film. A replacement is available in Sofirn’s Aliexpress store for about $3, so its low risk.

But any reflector that is not a cone would end up crinkly like lightbringer said.