Patio Door roller assembly

Hello I need the two bottom roller mechanisms for my glass patio door, the dimensions of the slider are 78"x36'x1,1/2"
The roller assembly itself as pictured is 2 and 1/2 inches long by 3/4 inches width by 1 and 1/4 inch with the wheel mechanism able to extend out another 1/4 inch
The only markings I could find are as follows:
AA/MA ANSI/AAMA 101-85
SERIES 420
SGD-C20