In a case like this I'd tend to either find another engine or do a freshen up on the existing one. Check car-part.com , there has to be a salvage yard that has one or two floating around. There is a large import yard in Ohio you might want to avoid or at least be prepared to be extra cautious when making the deal.

I'm guessing that this car is one of many "spares" and does not see heavy use. If a good used isn't in the offing, I've put together lots of "junkyard rebuilds" when the expected remaining life / yearly use does not justify a full $$$ rebuild.

The concept is to make sure the crankshaft and bearings are in spec as rod bearing failure is the number one engine failure point. Many times new bearings will take care of this. I forgo having the connecting rods resized on the big end if the bearings look evenly worn and or if the crank is on the small size. The bores tend to stretch top to bottom and pinch across the rod bolts. If the crank is slightly small this isn't a problem. Rod small end bushings get changed if they have then.

Pistons are reused if not in too bad a shape ( unless they are sub $ 20 per bore then they get new. ) New piston rings are used.

Badly worn valve guides are changed, one on the high side of the spec are left in, same goes for worn valve stems. The surfaces are ground and new valve seals installed.

Timing chain guides are replaced and chain sprocket sets if not too much $. The oil pump cover is ground flat as this is the largest cause of low oil pressure once you get past worn bearings.

The result is a good used engine that you can have confidence in. Sure, it won't last as long as a full mega $ rebuild, but it doesn't have to since the car probably won't outlast the engine.