Craigslist is probably the best way to find a local boat like this. It shouldn't be hard.

FWIW, day sailing a trailerable boat normally only works when the boat lives on its trailer close to the launch ramp with its mast up. It's one thing to simply launch, sail and retrieve a boat.

Raising the mast and otherwise setting up the boat and then having to break it down again is way too much work for a day sail. Don't ask me how I know.