Prototype sensor mount

MUST BE LOCAL TO SF BAY AREA Looking for help with a "works-like" prototype sensor mount to attach to the roof of heavy equipment cab. We'd like assistance creating the design and fabricating an initial version to test the concept. Does not need to be pretty - just minimally functional. We prefer to use off-the-shelf materials when possible. E.g. one idea would be to base the design off aluminum pre-drilled telescoping square tubing bolted together. There's still a fair amount of work in selecting other components and potentially designing and fabricating sensor mounts We can provide dimensions and details of mounting location and product details showing mounting screw locations for sensors such as cameras and GPS antennas. Ideally you act as single point of contact for any suppliers and fabricators and we reimburse you for expenses and your time in managing the process. Final deliverable would be the prototype mount and details needed to create it such as CAD files, BOM, etc. This could likely turn into a longer relationship building multiple iterations to handle different scenarios and improve the design based upon testing