I did fix it. I didn't take pics though as I was working against the clock, but here is how I fixed it:
1. I drilled out as much of the bolt as I could, running the bit through the bottom hole and into the broken bolt.
2. Took the air chisle out, and just bladed away around the inside of the nut that is welded to upper side of the subframe, until the nut broke free.
3. Rode th wife's bike to the hardware store to buy replacement nut, lock washers, and bolt (10x 1.5x 75mm long)
4 put the mount in, ran the bolt through with a lock washer on both sides, and was good to go.
Bone Stock Infra-Red 2003 SVT #2762 of 3985