Thanks for the reply M.B.DOC
I was just hoping someone out there might know of some aftermarket replacement parts.
For example, I had a problem once with my seat belt retractor system (worn out plastic gears). I was able to fabricate them with some printer gears (free) and it's been working like a charm for 3 years now. Couple months ago I read that there was a place in California which had the gears made out of aluminum ($50). Sure beats replacing the whole system, couple hundred per side.
I haven't had time to look at the self-leveling shocks. But from what you are saying I assume that they are sealed.
They will definitely have to be replaced then.