These I am using, they are a direct replacement for the OEM fans.
Part cooling fan: WINSINN 40mm Blower Fan 24V,... https://www.amazon.com/dp/B07RNPJ1YS?ref=ppx_pop_mob_ap_share
Main heatsink fan: WINSINN 40mm Fan 24V, Ender 3 Fan... https://www.amazon.com/dp/B08R9L9YR2?ref=ppx_pop_mob_ap_share