engine conversion kits would be nice, but since the swap options are limited, im not sure what you could in fact offer.
cut down diff housings perhaps modified radiators gearbox adaptor plates (eg 60a ) reverse switch ataptors for the 60a into a manual tunnel turbo manifolds
I guess the list goes on and on and on. i guess that if you offered the same soft of stuff in the 1000 as the 1200 then you would certainly be on the right track