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

2K Fit Rowing Machine Seat Cushion (Model 2) for The Concept 2 Rowing Machine with Custom Memory Foam, Washable Cover, and Straps- Concept 2 Rower, Recumbent Stationary Bike, WatterRower Seat Pad

2K Fit Rowing Machine Seat Cushion (Model 3) for The Concept 2 Rowing Machine with Custom Gel That Fits The Concept 2 Rower, WaterRower Pad, Crew Boat, Sculling, Kayak, and Canoe

2K Fit Rowing Machine Seat Cushion (Model 1) for The Concept 2 Rowing Machine with Medium Thickness Dual Density Memory Foam, Washable Cover for Indoor Erg, Concept 2 Rower, Water Rower Seat Pad

2K Fit Rowing Machine Seat Cushion (Model 1) for The Concept 2 Rowing Machine

2K Fit Rowing Machine Seat Cushion (Model 3) for The Concept 2 Rowing Machine...