Recently found that Jordan Levie was making these brackets called Ecto plates that allow for mounting accessories like:
Wireless HD Transmitters
I've often run into issues with our audio brothers and sisters where they present their audio-based boxes of sorts and it ends up changing my setup, often in less than desirable ways that take up needed real estate on a particular build. They generally don't have a pre-made solution to mount their items to but these Ecto plates seem to be a great solution. Worked with one last week and purchased my own immediately after the job. Had softside on each side as well.
Bonus, this site is primarily dedicated to the backpack rig, which creates solutions for ultralight builds.