I went to the salvage yard yesterday. They didn't have any diesel pickups, but they did have some diesel vans. The bracket(s) I needed looked the same... turns out they aren't. The pump is even slightly different.

I went to the Chevy dealership and ordered the missing bracket brace, and figured i could repair the broken pieces.
broken brackets
fixed brackets

The brace won't be in for a while. The part was discontinued from GM, but there's a company which buys all the leftover stock GM wants to junk, and they had one. It's still coming from the GM dealership. It's just a little 'S' curve brace that's missing... caused all sorts of problems. And of course, I also found an SAE bolt in a metric hole, an offsize nut, a replaced generic nut, and another missing bolt. The diesel at the junkyard had a missing bracket bolt too, but otherwise looked mostly untouched.

I started to put it back together and realized i forgot to pull the pulley to check out that missing bolt behind it... D'oh. Take it back apart tomorrow. Brace wont be in until next week anyway.

I guess i could just leave it out... it's just one bolt ;)