I believe the only company that still rebuilds directly for the owner and may have some already rebuilt exchange shocks for sale is Apple Hydraulics
applehydraulicsonline.com/collections/packard There was another place some had used, Five Points Classic Shocks, but their website does not seem to be currently active nor was it when I checked many months ago so they may have closed.
I think Kanter has someone else do their rebuilds and they probably have exchange shocks available for your car too. I bought a set from them for my 47.
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