You can use the models u_blox_casing.stl and u_blox_holders.stl to 3D print a casing for the C099-F9P application board.
The model u_blox_casing.stl is the case itself. The board is attached to the case by four M3 bolts (and the corresponding nuts and washers, of course).
The model u_blox_holders.stl contains two 'hooks' that can be used to rest the case on one's laptop's screen. If you want to add them to your setup, print them and drill two M3 holes to the case. The location of the hole depends on your laptop's size.
The result seen in the pictures was printed with PETG but PLA should also be fine.
No need to print with dense infill. The print contains small holes and the casing's two halves should fit together; so take that to account when choosing the 'resolution'.
