Here's a roller I can't find on Swisco.com

I am trying to find a replacement for the patio door roller assembly shown in the photograph here. I believe it may be a Klein but can find no other no information. The roller is: 1.75 inches dia and the housing 1.5 x 3 inches. Distance between holes in the attachment screw tabs is: 4.25 inches.

Does Swisco carry a product that could substitute?

Thank you for your assistance.