Is there a Malkoff drop-in for the Pila G2??

I have a Pila G2 with original Cree module and I would like to upgrade to something with full regulation on the 18650 cell. The original module only is regulated when two CR123 cells are used.

I am contemplating either something with a Q5 emitter and has multiple modes (L-M-H) but do not know what the best out there is for use with only one 18650 cell. The module in the Pila looks like the standard P60 with the outer and inner springs - but I am not sure if the standard P60 module works or not.

My other thought was if Malkoff had something that would work. Any info is appreciated.

Wolf -Eyes modules fit and work.

If your running the new models use an outer spring on the module.