I’ve been hmmming and hawing over another Filtertron guitar myself Spud. For my cabronita build I sourced some Gretsch Mega’trons which are sooperhot ceramic import trons found on the Corvettes, but finding a set is quite difficult.
I think an interesting way to approach this would be getting a hotter tron, like a Powertron, and having a Wilde pickups Q Filter in the controls to roll off some impedance - passively shape it down to Classic/Ray Butts/T-Armond impedance with a knob.