Your best bet is to print it with TPU HF from Polymaker

one thing is this print MUST be black otherwise you will get color cast on to the lens.

it is designed for the DRX ND system that you can buy HERE

I recommend you print with 2 walls on a .4mm nozzle and 4-5 floors/ceilings, 15 percent infil is also good 

however, the gopro tabs should be printed with 6-8 walls which will give it 100 percent infil.