Some users have had successes using dyes for nylon/acrylic/acetal like RIT’s DYEMORE products.
Given the price of the dye I think it’s worth taking a bit of resin and see if it dyes correctly, then try printing with just a few mm in a tank instead of dyeing a whole cartridge.
Don’t hesitate to give a feedback if you try this ! I’m also interested, I just ordered Rit DyeMore Graphite to try making Tough V4 black or at least darker and somewhat opaque.