I'm looking for a Vet that cares for exotics such as Marmoset monkeys.I live in Cowpens,SC please help me.TYSM

I have a 10 mth.old Marmoset monkey,and he has been with us since he was 1 mth.old.Everything has been great until the past month and now he is starting to refuse to eat,UNLESS we hold it for him or it is something sweet and he will gobble it up and come back for more.I haven't been able to find a Vet.anywhere around where we live or even in other counties near us.Our Vet we used before just closed and couldn't find us any other to replace him.We are worried that this might turn into something worse,but besides that we need a Vet that we can carry him too for just his regular check-ups etc.Please if you can help us,we would really appericate it.I have called every Vet,Pet Specialist,Pet Store,Zoo,etc.,but as of yet no one will help us,eventho they advertise that they treat exotics.He is an adorable little fellow and has become such a part of our hearts and family,that it would kill us if something happened to him that could be avoided if only we had a Vet.Any info will be appericated.