Thanks again for all the info.
Finding a wrecked boat with a good engine would be the perfect solution. But indeed what are the odds of finding one..?
This Mercruiser option that was posted http://www.michiganmotorz.com/mercru...nt-p-3188.html
might actually be one of the best options, since Mercruiser does have a dealer in CR. Indmar, PCM, Mastercraft, or anything else inboard-related do not. But still, $8K +shipping+import duties... That's a lot!