Try Andy at TackleShack in Pinellas Park, FL. If Andy can't find what you want it doesn't exist. Plus you wouldn't have to tow an unknown trailer x thousand miles. Where are you going in FL? There are already a few cats here. Look at FL CL listings. Other boats may fit the local culture better, too.
I have been scanning through craigslist posts from all over the country without any luck. I'll check with these places that you all have mentioned.
I'm tempted to pick up the trailex double stack trailer in Ohio that was posted last week. Only problem is then I could end up with two trailers if I find a boat that comes with a trailer.
