yatsushiro

I'm planning a rebuild on my fathers 200 Majesty. We've owned it since '84, but after my father died in 86 I've only had it running once, that was 10 years ago. Cosmetically it still looks good and original. However, I'd like to freshen up the engine a bit with a full rebuild, replacing all the seals, bearings and gaskets. I guess the bottom end is still TY175, but where would I find spares for the top end, such as piston, rings, gudgeon pin, head gasket etc ? Any help and guidance gratefully received... Regards Paul