Try http://www.homesforxchange.com. I've been a member with one of my beach properties and have already traded very successfully in Boston, Washington DC, France and Mexico. Great venue. Lot's of very nice folks to get to know.
We have short term vacation rentals reasonably priced in Cayucos, CA, only 5 miles north of Morro Bay. I can be reached at 805-234-4509.
Central Coast Real Estate