I’m pretty pleased with how this turned out. I put magnets in the corners to hold the back plate on, added a clip to the back using a screw and spare plastic piece, and made my own antenna. The antenna is attached using 3.5mm headphone jacks with each connector hot-glued in place, which isn’t super sturdy but is detachable in a pinch. The rest of the antenna is wound headphone cable wrapped in electrical tape and then paracord for looks. Work with what you got, am I right?