Based on this product's specifications, here are some alternatives and similar models
HP Cooling Solution Hewlett Packard Enterprise Z440 Memory module cooling accessory J2R52AA-RFB
Summary description:
Cooling Solution for Hewlett Packard Enterprise Z440 memory (MPN J2R52AA-RFB) by HP. Designed as a dedicated cooling accessory for memory modules in the HPE Z440 workstation, it helps maintain optimal operating temperatures and stable performance under load. Suitable for system maintenance, upgrades or replacements where improved memory thermal management is required.