If you want to keep the boat I would repower it. It seems that it would be harder to sale with a blown engine anyway.
Look at this site and see if this helps any.
http://1outboard.com hopefully you get her back running and are good to go.
Sorry to hear about the run of bad luck but most of us have been there at one time or another. It sure is a gut wrenching sound to hear and all you see is $$$$.