Not sure if this will help you specifically but it could be helpful to others. The American Board of Veterinary Practitioners has a program vets can go through to specialize in a species (this is different from the residency that exotics specialists complete) and you can search for a Reptile and Amphibian specialist in your area. The hoops they have to jump through to specialize include working with those species for a certain number of years, writing up multiple case studies and having them approved by the board, and completing a rigorous 3 part exam on their species of choice. Just another avenue to find the right vet for you!
https://abvp.com/animal-owners/find-an-abvp-specialist/