I had a Terraflex spare tire carrier on my 21 JLUR and I like how it relocated the 3rd brake light. My 23 JLUR has the oem mopar swing gate air compressor, and that compressor is mounted inside the stock tire carrier so I can't use a Terraflex carrier unless I relocate that pump.
I went looking for other mounting options, and found someone who created a 3d printed light mount which is quite similar to the Terraflex one.
https://makerworld.com/en/models/2600338-jeep-jl-3rd-brake-lite-relocation-mount#profileId-2869351
I don't have a 3d printer, so I bought a printed mount from the guy who created it. It was $20, and it arrived 4 days later.
Jeep JL 3rd Brake Light Relocation Mount - Portals
Custom 3D printed item available through Portals
teleportpod.com
Haven't had a change to install it yet, but the quality is pretty nice.