I have a Milgard silding classic series vinyl patio door. The rollers need to be replace and milgard will not send them to me, I am hoping you can cross-reference the part number it took 5 e-mails to get from them. P/N HA6653MI , the ones on it now are stainless steel. with a spacer on the top, I think the double wheels are 1.5"
Thank You for anything you can do. Dave