Technically you can get them from Asmodee but considering how expensive they are it's probably easier to just paint some bulk dice.
I also hacked them into Pokémon Tabletop United because the dice mechanics in that game are very bulky but there's so much of a good game in there. Like FFSWRPG dice are still pretty bulky, but not "rolling a d6 pool to see if you roll a d20 to see if you roll additive damage dice" bulky