You could try putting some old toyota rear springs in the front. Depending on far forward you moved the front hanger you may be able to run the later model rear springs that are a little longer 
I don't really know the measurements or if that would even work but they would be cheap and easy to find. I think they may be 51" long but I could be wrong.
!st or second gen rears is what I was thinking but that would pretty well require hysteer, and I don't think his accountant would approve the funds.
