Replacement PCM 3.1 unit compatibility

[mts]

My PCM 3.1 head unit in my 2015 Boxster S died. I've been search for a used replacement and apparently most Boxster/Cayman's came with the base head unit so it's been difficult to find a replacement. I have found several replacement units that appear identical to mine (with Navi, etc) that came out of Cayenne's and Panamera's. Does anyone know whether these units would work for my car? I know Porsche will have to re-code whatever unit I get.