Parts, and an upgrade?

Three dumb questions:

  1. Will the little Fenix diffuser fit the 4/7s Quark 2 AA tactical head, or the Nitecore MT 2A? Does anyone make an aftermarket diffuser?

2. Source for Kroll clicky tailcap switches?

I have the 4/7s 2AA light, the one subject to “preflash” in low mode. Is there a fix or upgrade that will eliminate it? Not harmful, but disturbing. O.k., I have found out that 4/7s is no longer in existence, so that answers that.
Thanx! :slight_smile: