If you want to keep it a high points car:
1. Get the re-pop spiral shockers from Ecklers. But beware, they do not fit exactly, so you need to get the full width lower mounts (from an existing pair) for the front and have them pressed in – and hope that you can find the correct dimensioned bushes to complete the set-up. (I could not, so had to ask a suspension shop to modify the circular tube end from a local Holden (Australian GM car) to make it right. And the bushed on the rear need to be pressed in from supplied. Oh, the rear shockers are 2" shorter that standard, so the product listing says use an extension. But I have a chassis cross member, which means that 2" shorter is perfect.
2. There are some guys around that re-condition the original shockers. Do a search through previous forum listings to find them.
3. Or get some non-spiral HD shocks, hopefully some that don't need any mods to get them fitting, and paint them undercoat grey to give them the right look.
Let me know if you want to know anything else.
(Btw, the Eclers re-pops are from later years. hence the required mods.)