Maybe one of these similar products would be of interest:-
Motorized Mini Exercise Bike Pedal Exerciser for Seniors Rehab Training, LUBBYGIM Electric Under Desk Bike Pedal Exerciser for Arm/Leg Fitness & Physical Therapy, 6 Levels Speed Adjustment
Samini Electric Under Desk Elliptical Ellipse Leg Exerciser Foot Exercise Machine Exercises Elipse Fit Equipment Adjustable Speeds with LCD Monitor for Seniors While Sitting for Home Office Use
Motion Matrix Elliptical Exercise Machine – Silent Under Desk Bike Pedal Exerciser – Portable and Compact Electric Under Desk Stepper – Remote Control Seated Stepper Machine with LCD Display
Folding Treadmill Electric Under Desk Treadmill Running Fitness Jogging Machine for Home Electric Walking Pad W/LED Display Screen Walking Running Jogging Machine (47inch)
Walking Pad Treadmill under Desk, Electric under Desk Treadmill Quiet, Flat Port