Based on this product's specifications, here are some alternatives and similar models
Leg Attachment for NormaTec 3 by HYPERICE — Standard Single-leg Compression Sleeve
Summary description:
Replacement leg attachment compatible with NormaTec 3 systems from HYPERICE. This Standard (Single) sleeve provides targeted pneumatic compression for one leg, supporting recovery, circulation and reduced muscle soreness after training or injury. Easy to attach to the NormaTec 3 unit, it is suitable for athletes, physiotherapy and home use.