On a recent gig I was introduced to the Riedel Riface. It’s a custom rack-mount chassis for two Motorola GM360 radios, so they can interface with an audio console, intercom system, or even themselves to use as a repeater.
One of the other guys in the company figured he could build one for cheaper than the commercial version. It uses two Icom IC-F6011 base units. Getting audio out of the Icoms is easy, there’s a 3.5mm stereo jack on the back.
Getting audio into the unit is more of challenge.