Based on this product's specifications, here are some alternatives and similar models
Pet steps TRIXIE 49931 Indoor use 300 mm width 1500 mm length
Summary description:
The TRIXIE 49931 pet steps are designed for indoor use, providing a safe and easy way for your cat to reach higher places. With a width of 300 mm and a length of 1500 mm, they offer stability and comfort. Ideal for helping pets access furniture or other elevated areas.