to my knowledge it is not possible at this point. And i don't foresee a redesign of the leather helmet mold/template to make it work anytime soon...just my opinion
stay safe brother and i hope to see you again soon!
no, the defender is a new skullcap system, and the leather helmet skullcap is part of the build phase. i looked into it when the defender system came out and talked to several reps. and even stopped into the MSA offices in Pitt. PA and unless the skullcap is redesigned its not gonna happen.