Maybe one of these similar products would be of interest:-

TreadLife Fitness Rowing Machine Replacement Foot Straps for Concept 2 Rower | Compatible with Concept 2 Rowing Machine (Models: D & E) | 2 Pack

TreadLife Fitness Rowing Machine Replacement Foot Strap for Concept 2 Rower | Compatible with Concept 2 Rowing Machine (Models: D & E) | 1 Pack

Seenelling Rowing Machine Adjustable Foot Straps Compatible with Concept 2 Rower Fitness, 4 Pack Rowing Machine Replacement Foot Straps Reusable Straps

Rowing Machine Replacement Foot Strap Workout Machine Foot Fixed Strap Easy Use

Happyyami Multifunction Rowing Machine Pedals Supplies Rowing Machine Replacement Foot Straps Parts Non Slip Leg Training Lightweight for Workout Gym Sports