The bottom of page 75 of the data sheet has details for ordering the brackets.
FASPRO Technologies, INC. Chuck Drews
In regard to alternatives .... Intel's online Click store has a pre-made protective enclosure in the drone section of the store that was designed for the older RealSense R200 model. You may be able to retrofit this for a D410 module, and have installation space to spare (the module has a space for installing a single-board computer too). This solution may be too bulky for your needs though.
The most obvious difficulty with such an adaptation would be that the camera cover plate's lense holes would not line up with the imager positions on a D410 camera.
A simpler mounting option is a magnet, similar to the strong magnet on the back of the R200 model for mounting to surfaces such as monitors.