The mechanic of finding dye is neat. But why not craft them by yourself? Claymore added the dyes to craft in a chemistry station.
20 paint and one glass jar equals one dye. He also made them instantly visible, so you don’t have to input “dye” into the searchfield. Not gated this time, because you can find dye pretty easily – mostly just not your prefered color(s).
The forum topic of the mod is here.