I am seeking a hinge/roller assembly for a 40+ year-old Pella casement window, as shown in the attached photo. This assembly mounts on the bottom of the wood/aluminum-clad casement window, enabling it to slide as the roto-operator is actuated. As you can see from the photo the assembly is missing three small metal tabs which hodl the teflon piece also shown in the photo.
Any help in finding this part would be greatly appreciated.
Thank you
Joe