It sounds as if you just needed a second-hand crankshaft to get it going again. An alternative might have been to get the eccentrics re-machined and then bush the matching links down to suit the remachined crankshaft, but all that might cost as much as a second-hand engine.
I hope you find an engine soon and at a reasonable price. Please let us know when you have news - I'll leave this thread open for now.
