You need some wooden or plastic parts you can't find anywhere, not even on Amazon, Ebay or Alibaba ?
My 3-axes CNC router might be the right machine to make them for you.
The parts shown in the picture are for car speakers.
I use Carbide Create CAD/CAM software to design parts and create the code for the machine.
The max. workpiece dimensions are 15 3/4" x 11 3/4" x 1" (400mm x 300mm x 25mm).
Pricing depends on material used and expenditure of time for design and machining.
Let's talk about your project and I'll give you a free estimate.
It might be cheaper than you thought it would be.