To echo above, run whatever you can get made the quickest, cheapest, and nicest. I'm guessing that any machining resources you could ask from other teams are better spent improving your manipulator than on your electronics board.
My team uses
perfboard, which is really easy to cut and makes mounting really nice and easy. We're using 1/4" this year, but 1/8" is fine for most applications.
Just use a jigsaw or cut it by hand. Pretty belly pans are nice, but in this case, good doesn't always need to equal pretty.