If you ask VC nicely he might have some excess sperm lying around that you can have but I think the Masdubation stickers were limited in numbers.
i do have some spare sperm swimming around as it happens
not sure what to do with them tbh (3 sets of 4x red/black/yellow)
as for the actual decals, your right, i cant make anymore now... they were done with the forums artwork and their permission and numbers were limited