Based on this product's specifications, here are some alternatives and similar models
Accessory HP Elite Mini EPS Holder by HP, model 657R3AA
Summary description:
HP Elite Mini EPS Holder (model 657R3AA) is an official HP accessory designed to secure and organize HP Elite Mini systems and their EPS-related components. It provides a mounting solution for compact workstations, helping keep equipment stable and accessible. Suitable for office and business environments where space optimization and tidy cabling are needed.