Free
This mounts under the seat of a 14th Gen F-150 (Tested on 2021F-150 XLT). You need to install 2 rivet nuts into two holes circled in the last picture in BLUE. Before installing the bracket attach the inside holes marked in RED to the bracket using a nut and bolt. Next, attach the bracket to the rivet nuts by passing a bolt through the OEM Motorola bracket and your new bracket. I recommend using some Loctite to make sure it stays on.
Names are used only to indicate the source of a result. Polyzon is not affiliated with the listed sites.