You could use a Mean Well UHP power supply, like this one: https://www.amazon.com/MEAN-WELL-UHP-350-24-350-4W-Switching/dp/B083P5VP3L/ This model is fanless, also provides 350W of maximum power, and the mounting hole pattern is the same (or very close) to the one used on the Ender 5. The catch is that it is more expensive.