this may not do you any good other than to know that something might be out there on Craigslist

http://atlanta.craigslist.org/atl/boa/2525045771.html

another idea is to get friendly with the local Moomba salesperson and if they sell a customer a boat who doesn't want a trailer, you pay the buyer for their trailer. Reason being is that the trailer is "worth" more than the credit the dealer gives if the buyer takes the boat without the trailer.