Actually I'm looking at 2 things either a 9" from a 57-9 Ford/Edsel wagon or a Bronco and both of which are the same width as the G Body and I also happen to know where both are. I have also found brackets on E Bay for the axel conversion (about $50).

The other option is a a place called Quick Performance Inc out in Iowa that sells a bolt in 9"/G Body set up with housing/after market axels and brakes (drilled for GM 5 on 4 3/4). A bit harder on the budget but definately something I'm thinkg about.