These doors were installed around 84. The roller housing is attached by one screw and two hooks on the underside. The height of the housing from where the adjustment screw starts in to the bottom of the nylon roller is about 3 1/2". The width of the wings for the attachment screw is also about 3 1/2".
Bob from SWISCO responded:
February 10, 2021
See our 23-064 Concave Roller system, which was used by Charmac. Look over the dimensions and see if this matches what you need.
