Bipass sliding mirror doors

Bi-pass sliding mirror doors.
This is off a motorhome, 2002 Fleetwood Bounder 39r.
The door was manufactured by Shower Enclosure America, Inc. (SEA).
SEA says the manufacturer of the mirror door roller assembly wnet out of business in 2004.
The width of the assembly is .5".
The roller has a concave surface to meet a ridge on the track.
Even if I could get 4 wheels, I could rivet it in place.
The wheel would have to be 1" diameter. with a .25" width.

Thank you.
Robert