How to get a mounting clamp and screw arrangement made for a sensor installation?

Our startup company is developing a sensor prototype that will be installed outdoors. A mounting clamp and screw design is required so that the sensor remains aligned. I have seen such an arrangement in many different places but am not sure where to get it made. We have thought of the following options, will really appreciate if you can point out best option: 1. Make it via 3D Printing ? 2. Get a company in china to make it ? 3. Get something off the shelf (not sure if there is anything available to our measure). If you can refer us to the right company or URL, it will be great…