I'm not sure what consumer source is available which utilizes dual projectors. Dual projectors requires a proper screen and all the polarized stuff which is why the decision to go to active shutter glasses for residential 3D was decided as the best way to go.

I've never known, met, or heard of anyone with a 3D front projection dual projector setup and we are just starting to see some 3D capable, single unit projectors come to market right now.