I got my 1 3/8 inch bars for $133/each + shipping from Addco. I know the smaller bars are cheaper, but not sure by how much. Just to give you some idea on pricing. the thing in the tech articles has the bars I got listed as $126/each. I assume its just old info and the price went up a bit. It lists the 1 1/8 inch rear bar as $105 in there. So porbably look at spending $110 through Addco per bar.
Former owner of 94 Bird with DOHC 4.6L swapped from a mark VIII
2011 CTS-V Wagon
1968 Torino was an original 289, C4, fully documented numbers matching car. Now: DOHC 4.6L/T-56 swapped, Cobra intake, IMRC delete, BBK long tubes and H pipe. Dynotech Aluminum Driveshaft, 9" rear with TrueTrac and 4.11's.