I have 1970 era sliding mirrored closet doors. The rollers hang from the top of the door. The rollers spit out the bearings and I can't find replacement parts. An aluminum rectangle piece about 2.5 inchesX 3/4 " wide slips in a channel vertically. It has the wheel on top at a right angle to the aluminum rectangle that slides in the channel. The aluminum rectangle is held in by a screw. I would love to get a replacement.