I have some older Quaker Made Cabinets. The rear sockets for the drawers have failed in a couple of them. The only markings are an R and L on the brackets. The slots measure approximately 1 inch by 3/8 inch. Attached are pictures of the right socket and a left and right one installed.
Tom from SWISCO responded:
November 17, 2020
Hello! Our 32-089 is a slightly different design, but the most important dimensions seem to match. The slot on ours is also 1" x 3/8". Look it over and see if you think you could get this to work.