If there's a cat/dog vet you can get to, you can usually get the antibiotics you need from them. Just talk to Dr. Frye first and see what antibiotic and dosage he recommends. Most small animal vets I've talked to will 'treat' exotics by giving you the meds if you come in knowing pretty much exactly what you need.

Good luck and keep us posted. Don't know if it has been mentioned, but it may be a good idea to change out the paper towels every day or every other day... If that abcess is leaking pus (filled with bacteria) into a warm, wet tank, then those paper towels could become a breeding ground for whatever the infection is REALLY fast.