Found this on Expedition Portal and also on eBay. Nice design to hold a Baofeng UV5R radio and includes a 1/4-20 nut welded to the back to accommodate a RAM mount ball.
eBay listing: Universal Metal Holster Mounting Bracket w/ NUT For Baofeng UV5R Handheld Radio
Original Post here: Baofeng UV5R "Builder Brackets" - Expedition Portal
Pic from another user:
eBay listing: Universal Metal Holster Mounting Bracket w/ NUT For Baofeng UV5R Handheld Radio
Original Post here: Baofeng UV5R "Builder Brackets" - Expedition Portal
Pic from another user:

