Pick your toys up mate, no need to throw them all out of the pram. You've been offered a low mileage block and crank minus pistons and rods and people have said there's plenty of running engines on ebay for sale. To be fair these cars have been knocking around for 20+ years now, not gonna be many low mileage ones out there, it's like looking for a needle in a haystack. Your best bet if you've got a fresh head and chains would be to get that low mileage block and crank off six appeal get some new pistons and rods and build it up and hey presto brand new engine or as near as your gonna get to a