I am restoring my 68 vert and am working on the convertible top frame. It appears that only one of the plastic bushings is broken and needs replacing (one of the 4 main pivot bushings which are available from Mustangs Etc in Van Nuys,CA), but I would prefer to replace all that I can get to since 53 year-old plastic makes me nervous. I have read other threads on the subject and am not able to find any that will work. Given that the threads I read were 5-10 years old, I thought I would reach out to the forum again to see if anyone has identified a reproduction source. Can anyone help me locate replacements for the other bushings?