The issues with pink squares isn't lack of sprite variants per se. The bundled dll is nuts and tries to read male, female, thin, hulk, and fat variants for all apparel related textures even when it's not necessary (therefore lacking the variants). This happens even on bodytypes that are vanilla, and even on female, and what's even more hilarious is it happens even on the modded bodytypes too.
The fix is to find the asset through Unity Asset Bundler or from a mod and then copypasting it into the directory 5 fucking times correctly as male, thin, etc.