thanks for the tip on ESPO, 67CudaBob. I just sent them an email / request for quote.
One question though, is it true that almost any A-Body leaf spring could work on my 1963 Valiant v200 (225)?
For example, I found one place that sells them for "65-76 Valiant, Dart, Scamp" , 6 leaf (2.5" lift), for $110 each.
I find it odd that nobody lists leaf springs for this particular 1963 model.
...maybe i'm better off going with ESPO anyway since they match their pairs. I guess I'll have to wait and see what kind of price they are asking.