I've got an SU manifold if you're interested and A15's aren't too hard to find.

Specialised datsun places started disappearing 5 years ago. These days, you've gotta look in the trading post, or on the net, to get second hand stuff out of peoples garages.
It's no longer a sport... It's a hobby I'd say. Because money doesn't buy everything these days (This is why the datsun specialists have disappeared). Nissan Japan has almost run out of parts too.

is there any specialised datsun dealers or companies that sell parts for datsuns i want a a15 block and twin su manifold but i dunno where to start looking