Replacement bottom roller assembly for sliding mirror door

Attached are 3 images of the bottom roller assembly - two of the frame and one of the entire assembly with the roller assembly mounted. The frame that I have is missing the roller assembly and I need to find one or the door will fall apart (again). The frame has 2 locking tabs on the bottom and the sides have identical tabs with a piece that inserts into the frame and tabs sit on top. I don't know who the manufacturer is as there are no markings on the doors to indicate that.
Can you help?