Florida Sunroom window rollers

Attached pictures show a window located in a Florida sun room which had rollers but they have all deteriorated and no rollers now exist. We bought this property 1 year ago and don't have any information on the manufacturer of the windows which may be 40 years old.

The size of the opening is 5/8" wide by 21/32" deep. From the end of the window casing to the screw hole is 3/4" (see picture IMG_3716).

I looked through your available window rollers but didn't see a fit or anything that I could adapt. I think the ideal roller assembly would be 9/16" wide x 5/8" deep x about 1-1/4" long with a 1/2" roller. I am willing to try a roller assembly that isn't an exact match and my require a spacer to make it work. Any suggestions? Thanks.