Rollers for Heavy Aluminum Dual Pane Windows

Submitting pic on seperate email of old sliding window roller assembly. Have 12 large heavy aluminum dual pane windows in Mexico and need to replace with quality roller assemblies. 2 and 1/8"tall, 1/4" x 3/8" wide with sheet metal screw to anchor in place. Windows were assembled on site three years ago in central Baja Mexico by a small window installer from Ensenada 7 1/2 hrs north there and 2 hrs south of the border. Suspect aluminum frames were imported from Southern calif.