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

FIGHTR® Ankle Strap (Padded) - for Cable Machine - (2 Pieces) Leg Cuffs for Women and Men

Barbell Pad and Single Ankle Strap Set

Dumbbell Foot Ankle Strap Ankle Weights Tibialis Trainer Home Gym Leg Workout

Lekaro Weighted Vest & Wrist/Arm/Ankle Strap Unit Without Weights

Ankle Weights Monkey Feet Weight Lifting Adjustable Weights Dumbbell Ankle Strap