by a local metal fabrication shop, they never let me down and their work is inexpensive.
Here are a couple of recent photos of some brackets I had made to mount cameras onto concrete lamp posts. The twin cameras needed a large single IP rated junction box so I could access the connections and could view the cameras locally for pointing and focussing
In these you can see the technique of using steel banding to tie the bracket to the post. Normally solid steel banding but I did not have the equipment such as banding tensioning tool and the steel buckles which are used by the guy that used to install my wire support rope. By the way, in this case I used the banding to support that too. The second picture shows the banding and the wire rope best.
Please excuse the wires, they wee too short when first installed so they have been removed abd new ones installed to provide better water drips before entering the junction box.
Thanks for sharing.