Tundrawookie

I have a 96 Tacoma with a 2.7L. the truck has 150,000 miles on it. It received a new engine @ 100,000 (previous owner) after the Toyo shop botched a timing job resulting in a blown engine. Two months ago the key on the harmonic balancer broke and cased the Crank to be mutilated beond repair. I was thinking of getting a Japanese low millage engine to replace the current one with while I rebuild it. After which I will either keep it as a spare or find a truck to put it in. I'm looking for a dealer/importer to the US but as of yet have had no luck in finding one Any thoughts Cheers E