Think the guys around San Jose used '57 Chev station wagon springs. But the spring dealer everybody uses now makes fresh ones for lowered, raised, etc.
638 and 656 are listed by Rockauto for the 55. You can see some alternate Moog springs here. The compare height are the difference in fender heights.
There is also an aluminum block/spacer that put the upper ball joint lower with raises the front of the car...