isn't there an engine rebuilder with shortblocks somewhere nearby , like through a local auto parts store? how about just rebuilding yours. Pull it, have it bored over .030 put hew bearings, pistons and rings, and send the head out for a rebuild.
check for a used engine, with under 50,000 mile sthrough the online auto-wreckers...
You have 100 options..
If you are not pulling the engine yourself, is whoever R&R'ing the engine, asking for a specific replacement, or they will not do the work or wil not warranty the work?
A little mor einfo can give better answers,,,
will the car be a transporation car? or a project to make it fun?
Too bad we have crappy smog laws...
now is the time to do all the fun things... if you save enough money and do it right, you can take the extra cash and make some of the extras more fun..