Wotto, I think this is entirely do-able using a 3D printer, which could make a copy of the part itself or even make an actual mould in which you could pour an epoxy resin into.
My best mate has such a printer, if you can show me a picture actual sized of the flipper or better still a sample one thats busted then I'm sure we can do something.
Incidently the printers worth about $60,000.
Chris
