Someone was looking for a source for live goats a while back. A friend mentioned this weekend that Blood Farms in W. Groton does custom halal slaughtering (a friend of a friend was getting meat for the upcoming holiday). Don't know if they do kosher as well. In looking for their address I found a few more sources; see link.
(Yes, Blood is a family name. They are the premier slaughter operation in North Central Mass.; my sheep-raising friends all use them. They also buy animals at auction and sell frozen meat.)