Based on this product's specifications, here are some alternatives and similar models
Power supply Dell PWR SPLY 750W RDNT FLX V1 (model 6W2PW-RFB) 750 W, redundant-ready, server PSU
Summary description:
Dell PWR SPLY 750W RDNT FLX V1 (6W2PW-RFB) is a 750-watt server power supply designed for redundant configurations. Intended for use in compatible Dell systems, it delivers stable DC output for server components, supports hot-swap replacement and redundant setups to minimize downtime, and fits standard Dell power bays for straightforward maintenance.