Could spiderman Pat Watkins be the answer? Their build is very similar and even if Moss has a speed advantage, Watkins plays over the top (it's hard to outrun a deep free safety).
Keep Moss shallow at best, make him go over the middle, and he's no T.O. there
I'm sure Watkins will see some time but Dallas is not going to sit the starter like Williams and Hamlin. I expect to see Watkins in as NE goes to 4 and 5 WR sets