I havn't been able to find them either, but I did find some interesting info on the stock springs.
Some have said that the two springs (L vs R) are different and others say there the same.
Here's spring dimensions on part #NCP2771937 from the NAPA web site-
Type:One Tangential End; One Pigtail End
I.D.:6"
Wire Diameter:.672" Driver Side/.703" Pass. Side
Load Height:11.5"
# of Coils:9.75 Driver Side/ 9.25 Pass. Side
Design Load:1625 Driver Side /1750 Pass. Side
Spring Rate:357 Driver Side/417 Pass. Side
Free Height:16.06" Driver Side/15.69" Pass. Side
Strange. Heavier wire on the pass side but the spring is shorter.
