The company I used to work bought custom made boxes from a fab shop. This fab shop - all they did was make metal troughs and boxes. Indoor or outdoor. They even provided POCO approved CT Cabinets for less $$ then the POCO. I was told "if you draw it out and / or explain it to us - we can make it for you" I put them to the test too. I had some interesting troughs made! Might be worth the search to see if such a thing exists in your area.
