Made this back panel model as i could not find one online. the plan is to make a fan bracket to add more cooling.
 

Both a .stl and f3d is available

This was printed on a Bambu P1S with Bambu labs own PLA.
Printed with the “standard” 0.2mm profile in bambu studio
I do recommend brim ears to be added as this is a large flat model with sharp corners and with support for the latch clips