Mariner 30 Lower Unit

[Daurin]

I have an early 80's 30 hp Mariner (by Yamaha) longshaft #689 L 411690. Apparently the shaft is 60/1000ths out. Lube leaks out, water gets in. I have looked everywhere locally and on the net I can think of to find a replacement lower unit, and struck out.

Surely, somebody must have one of these on a shelf somewhere in good condition?

Thanks.