Fills for Mexico patients
I'm almost positive that my surgeon, Dr. Roy Shen, and/or his partner, Dr. Jiser will do that. I seem to remember when I was in the waiting room for my post-op appointment, that there was someone there that had the lap-band in Mexico and was waiting for a fill.
They're both out of Saints Memorial in Lowell, but I've heard recently that they're also doing surgeries in Concord (not sure of the name of that hospital).
Dr. Shen is listed here on this site...
http://www.obesityhelp.com/morbidobesity/bariatric+surgeon+profile+Roy+Shen+ngs.html
Otherwise, I'm sure there are other surgeons who will accommodate you.
Good luck!