All the parts are available. A14 engines were still in production as of 2007.

* Nissan auto dealer has most of the parts, but for new block and head, you may need to go to Nissan forklift dealer.

* In USA, most auto parts store can get most A14 engine parts. For example, Schuck's in Washington State: Schuck's/Oreilly Auto. Search for 1980 Nissan 210, they came with A14 engine.

That wouldn't happen to be a Morris Victoria would it? I've never seen one. Several Datsun1200 club members have put A14s in Morris Minor vans and pickups.