Hi johnwest.
Rip Curl School of Surfing (
ripcurlschoolofsurf.com/courses-reservation/stand-up-paddle/) are the official Starboard dealers in Indonesia. They are located in Sanur and they have a base in Sanur beach hotel, right in front of some great SUP spots. I've checked their website and you can also reach them in Kuta, Legian and Jimbaran.
I was there in March and they had a great and professional service. Thanks Jonni Deaker!