Based on this product's specifications, here are some alternatives and similar models
Pad BEEZTEES TRIXIE 48171 cat scratcher accessory, rectangular plush polyester 550×350 mm
Summary description:
Replacement pad for TRIXIE 48171 cat scratcher accessory by BEEZTEES. Rectangular plush polyester pad sized 550 × 350 mm, sold as a single piece. Designed to provide a soft surface for cats to scratch, rest or play and to refresh existing scratcher units. Easy to attach and suitable for home use to maintain hygiene and comfort.