Possibly try some people who rebuild them?
Not sure what you mean by reasonable, cheap ones are cheap because they do not function and need rebuilding, sometimes they are not rebuildable. Sometimes you need twice as many to get one good set.
One rebuilder is John Holland, older guy, had mine rebuilt by him, happy with the job he did. Out of Ohio. Very good guy to get info from too, willing to spend a few minutes with you on the phone. phone 330 483 3896
Another option is to convert to standard style shocks if not concerned about judging/authenticity.