Sliding glass patio door roller assembly

I have a 20 year old vinyl patio door that needs its rollers replaced. I cannot seem to find the right fit at the local hardware stores or online. The problem is that the roller assembles are not high enough or the wheel protrude too far below the door. There is almost zero clearance between the bottom of the door and the frame when I lift the door to remove it. The door was a SUMMIT WINDOW manufactured door, series 8670. The exact dimensions as I tried to depict in the images are 5-3/4" center to center for the mounting holes, 1-1/4" diameter wheels, 1-1/2" from the top of the mounting tabs to the top of the spacer at the top of the assembly. Width is 3/4" at the widest piping. Outer width of wheels is 7/16". Notice the tabs are slightly offset below the assembly which helps with the wheel clearance.