I see now I made a mess of bad spelling and incomplete sentences. I was typing too quickly.
I meant to say laser cut the bottom shell though FDM 3D printing would be fine too, and then make the pieces which stick up from the base you have made.
With overhanging parts I recommend printing separately and then using acetone-ABS plastic glue to join them together, it is much stronger than a badly fused overhang one piece FDM print.
I am sure you already know that you also need to do post print processing with acetone to strengthen the print fusion, and sand, wire brush, and sometimes trin or fix small parts like the 'fingers' which grip things like the way the battery cover is held on.
Since these fingers can't really ever be very strong I recommend the printed screw receiver inserts, this is better than a cover which falls apart constantly.