I've got a set of good, used 3.23's I can send you for $60 plus the ride. I can send along the carrier as well, and you can weld one up while you use the other.
I cant imagine getting it to me up in canada would be too easy...but I dont think its worth doing too much work to the 7 1/4 as I have a 8 3/4 with 3.55 gears that will be going in over the winter.