Maybe one of these similar products would be of interest:-
Reliable Rowing Machine Bearing Wheel for Optimal Performance Gym Accessory
Reliable Rowing Machine Seats Wheel Bearing for Stable and Smooth Movement
Athletic Essential Reliable and Sturdy Non Slip Rowing Machine Foot Pads
Reliable LCD Display Counter for Rowing Machine with Multiple Functions
Sturdy Rowing Machine Wheels with Nylon and Steel Construction for Reliable Use