So I am reupholstering some seats from a TR4, they were in pretty rough shape. Once I had all of the material off and the frame stripped I noticed that one of the two frames was missing one of the seat "buffers". The part is unavailable and I'm at a loss about where to go from here. Does anyone know if there is a comparable part, or a good solution to this problem? The other 3 buffers are rusted to the frames so they are going to be a pain to remove but I will replace all 4 if I need to. The TR6 buffers do not fit where these are supposed to sit on the track. I've attached a picture of the buffer I'm talking about.