Someone must have a mold or the mold I dont know about the square one but here are the current ones Marco is selling atm so I suppose its a matter of finding out who there supplier for these is. Obviosly someone is making them in opaque colors atm. http://www.marcospecialties.com/pinball-parts/A-18605-5X
Now just need transparent colors and ill buy a shit load for the target plastics if anything.
Ok well i take it back on the square ones heres and opaque yellow square from marco currently as well http://www.marcospecialties.com/pinball-parts/22-1034-01