Odd...I have the exact same problem. The lift chair is my Mom's, bought 19 years ago. I called La-Z-Boy, but they said they couldn't get parts for it and basically didn't want to deal with it. I could have made an appointment, but it would be two weeks and cost $75 just to look at it. So I took it to a friend who is a machinist and is going to try to make the part. (Metal, not plastic, obviously). Maybe I can get him to make some extras. This seems to be endemic.
Mary S
March 2008