Aparently there arent many aftermarket items for this rear. I havent been able to locate gears or girdles for them, has anyone else had some luck?

 

As far as I know there are NO girdle options for those rears, there was one that was supposed to come into production a while back but I don't think it ever did. The only gears that I am aware that are still offered are those from GM which are the factory 2.xx, 3.27, and 3.45, and there are at least a couple places that can get 3.70 gears for them. You can check out 9bolt.com and get some more info about whats offered.