So we have an issue!

Reginald, my 11 week old babe, is near ready for his 2nd distemper vaccination. We called the vet to schedule an appointment, and they said they'll do rabies, but that they don't carry distemper vaccines for ferrets. There are no other vets near by who I would trust with my ferret. I'd really like for him to have the vaccination, since he goes out and about with me so often, and is around other animals (including dogs). 

Does anyone know what I can do to get him his second (and eventual 3rd) distemper vaccination?

Thanks,
Pero and Reggie