I have a hand tool at home that I bought at a gun show to use as a deprimer for BPCR cases. I used to to deprime at the match and drop the cases into my jug of soapy water. The tool is actually a loading tool made by a company that produced plastic bullets for indoor practice. I cannot remember the name (damn gray hair) but it did everything, deprimed, primed and seated the plastic bullet.
I did a search for plastic bullet kits and such and looked at images and found nothing. I suspect they did not work very well and were a short lived product. When I go home to mow, if I think of it, I'll get the name off the tool.
As a side note, a late friend of mine was World Champ Quick Draw artist more than once back in the 60's. He practiced with and they use wax bullets in events. I thought that he just used a primer in the case. But did some research and see that the rulebook for one of the organizations doing this uses BP or BP substitute Hodgdon 777.