Jim,
You can get new jaws for that at Wilton. Any internal parts it might need as well. There is a guy who sells Wilton Parts on the 'net, but, I don't have the address at hand.
jOe, if you are waiting, my son and whatever spawn he has will more than likely keep my vise in use until not only your grave location is forgotten, but, your little paper weight vise has been smelted into something useful by the Chinese.

Best,
Ted