Just spent an hour online going throught the Jim Carter Classic Truck Parts catalog.
http://oldchevytrucks.biz well worth taking a look through if you are looking for Chevy parts. Looks like they have added a number of engine parts. Also they have useful information if you are considering up engining to a 235. Know that shipping and exchange rate may make them expensive in some parts of the world but if in real need they might be worth checking.
Cheers