Hey Scott-
Sorry to hear about your motor (bummer). I am sure you will be calling of the usual places.....Monahans, Baert but dont forget about Hudson's Outboard. I know they have a few HPDI's in stock.
Also, you may want to check out
www.boats.net...they sell Yami outboards for very cheap. I think it costs $250 to have them shipped up from FLorida.
Lastly, there was a posting on here from some guy on the Cape who just bought a 250 HPDI from some dealer in Florida for $12,600. You may want to contact them and see what they have.
IF I WERE YOU.....since you are going to have to raise your "modified" transom from 20 inches to 25 inches.....I would buy a motor with a 30 inch shaft and raise the transom to 30 inches. SOmetimes, you can get a better deal on 30 inch shaft motor because they dont move as many of them.