I designed my own one which is slightly better at airflow than others, which I found to be too flat, This is also easier to print and only requires a tiny dab of hot glue along the channels that I put in and quickly sticking down. No screws. Be sure not to use hardly any glue or it will sit proud and any gaps will allow dust etc to go in under it.
This make surprisingly makes the case fan silent as well as stopping filament falling into the electronics
PS: It also fits the Ender 3 since this is a clone machine.
Technology Outlet PLA