Allen Brickhaus had a little something to do with this also, I think. You just need two pair of Vice Grips. You grind a flat spot at about a 45 degree angle to the front edge of the jaws on one side of one pair, and then you grind a matching flat spot on the opposite side of the second pair. You mark your spot where you want the bend, lock on the first pair, then leave a small gap, then lock on the second pair. Then you grab the handle ends and spread them apart to make the bend. The 45 degree flat spots give you the clearance you need to have the vice grips close enough together to do this. The flat spot takes up about half the jaw, but you should still be able to use the vice grips for other works still. I , myself, prefer to use the Harry Higgly bending jig. It's small, simple, no moving parts to wear out, but you do need a solid vice and work bench to use it, but 99% of us all have that anyway. What ever method you use, practice with coat hanger wire or some other soft wire to work out the details while you get used to the process.
Type at you later,
Dan McEntee