I tried two different fans, one Papst and one Sunon and went with the Sunon since it is quite a bit quieter than the Papst fan. So check you are getting one with the correct voltage and you should be good to go.
Once you opened up the PSU you might consider removing the cover in the fan area completely since these cutouts can make a quite annoying whistling noise.
Also have shown this here:
https://forum.snapmaker.com/t/sm2-power-module-noise/6129/120?u=andomaster