Currie makes a bolt in housing, but it's pricey at about $700, I believe. The other option is ladder bars and coilover shocks, again pretty pricey. I'm running a built 9", ladder bars and coil overs in my G-body cutlass. I got about $2000 in it and I did all the work myself. It's going to cost you any way you go, but I have to agree, 12 bolts are getting hard to find.