Did you call a local retailer or Dish directly? I think that's Dish's policy when you order from them but we are a local retailer and happen to be in the Albany, NY DMA as well, but not in Massachusetts.
So if you can install a single dish that covers both 61.5 and 72.whatever in Albany, it should be doable here, us being neighbors.
I used an installer out of Pittsfield who helped me out over the years with both big and small dish.
I called the local retailer directly. Maybe he didn't realize there's a workaround.