bottom roller for a vinyl slinding patio door

Hoping someone can identify this or at least direct me where I can purchase this. See pictures, it is a bottom adjustment roller from an inexpensive vinyl sliding patio door approximately 25 years old. measurements as follows:
width about 4 inches depending how far out the threaded adjuster is.
height 1 1/2 inches depending how far out the rollers have been adjusted.
Width 3/4 inch including pin 5/8 inch with out pin
Housing measures 3 1/8 inches x 1 inch x 5/8 inch