I've taken my snakes to the Argyle Animal Clinic. Both of the vets I've seen there were very knowledgeable and helpful. I live near Orange Park, though. I've heard that Riverside Animal Hospital is good too, though I've never taken any animals there.

The only pet store I can think of that has feeders is Blazin' Reptiles on San Jose. I've been in there and gotten a few feeder there and they seem pretty healthy.