You might be able to fix your good chair. They make replacement parts for nuematic types. I am sure that is not spelled right. I have a very expencive chair that My husband bought at the Relax the Back store. Over the years the part that makes it go up and down has lost all its oomph. I did a google search and there are parts out there for them. Another clever fix I found when searching was to use PVC or something that can be put in when the chair is the height you want it. I think they cut it in half or something then used pipe clamps to put it back together. Might be an idea.