I tried one of the Nite-ize conversions to a mini-mag and didn't like it at all. I ended up buying one of the Mini-mag led lights and am very happy with it. Bright, no dark spot in the middle, on accidental on-off, and only $20. But as for a diffuser lense, haven't seen one. I supposed you could take a diffuser from a USGI flashlight and cut it down to fit, but I haven't tried it...