I was orginally looking for a rigger in the area, and got side tracked with a supposed direct drop-in replacement for an atomic 4.

http://www.winton.ch/Templates/guidelines-seagoing.html

The BZ482 is a 13.5 Hp kubota based diesel, I sifted through mounds of google hits and found one price quote at 5,800 dollars for the BZ482 (http://list.sailnet.net/read/attachm...lversion.html).

It's not something I want to do in the near future but maybe a viable option for someone who's stuck with the issue.