Brackets are available from JC Whitney. You need the SMALL size 15/16" sway bar bushings. THE LARGE ONES DO NOT FIT, I REPEAT THE LARGE ONES DO NOT FIT!
http://www.jcwhitney.com/autoparts/ProductDisplay/s-10101/p-1578/c-10101 Part#-ZX887545B
Backing plates can be made from 1/8" thick steel by taking the sway bar bushings bracket and tracing it's shape out onto the steel peice and cutting it out. I found stell strapping that was almost the exact width, and just cut it to lentgh. drilled the two holes and shaped the edges.
