Hey KID, Why not buy an extra set of standard jaws for your danvise and grind the tips off your old jaws and retemper them. Then you would have a set of jaws for heavy hooks, the danvise cam mechanism is plenty strong enough for heavy hooks and on many boards you will see complaints of the jaw tips flaring or cracking usually due to improper jaw adjustment. If you will google Danvise jaws you can find a description of the process. You can buy extra jaws from Al Beaty, but you had better hurry as he is closing his business and retiring.
"Tap her light and she'll always be fresh"