At the top of this list is Dr. Christie Balcombe. Not only does she operate the only mobile vet practice on the island, and not only is she a ACVIM Board-Certified Specialist in Large Animal Internal Medicine, she's also a downright delightful person. Who loves goats. I can stop right there, right?
A wonderful public resource for looking up pedigrees, 'trying out' breedings electronically, and searching the entire ADGA genetics database for production and type information. Membership to ADGA not required. Premier One Supplies https://www.premier1supplies.com/
A good source for electric net fence, solar chargers, and clipper/shearers. Call for shipping charges to Maui. They will work with you.
Caprine Supply https://www.caprinesupply.com/
All things goat-meds, equipment, dairy supplies. Nice people, good customer service.