Maybe one of these similar products would be of interest:-
Pivot Cover 372009 Works with Pro-Form Hybrid Trainer(WHT) PRO Elliptical
Roller Wheel 104247-001 Works Works with Octane Fitness Pro 4700 Pro 3700 Elliptical
Proform Epic 1200 Pro Elliptical Ramp Wheel
Hydra Fitness Exchange Crank Axle with Hub 375856 Works with Cardio HIIT Trainer Pro Elliptical