Maybe one of these similar products would be of interest:-
1PC Rowing Machine Seat Wheel Nylon Roller Wheel Bearing 8x36x10mm Drawer Track
Rowing machine seat wheel Nylon roller wheel with bearing 8x36x10mm Drawer track
Rowing machine seat wheel Nylon roller wheel with bearing Drawer track 8x36x10mm
8x36x10mm Rowing machine seat wheel Nylon roller wheel with bearing Drawer track