Are you sure it's purple? It looks kind of blue to me.
Just a stab in the dark, but perhaps this was a Gemaco design? Gemaco was owned by USPC in 2000 and operated independently, but it appears that they sold it to another company, Gaming Partners International (GPI), which also manufactures Paulson cards. Some of the patterns they've used on casino decks are a little different than the typical Bees and Aristos.
Good luck in your search.