I have a tcu that you might want to try first.
Mine is a new (remanufactured) one and it is one of the part numbers listed above. As you know I am having problems getting the Bluetooth to pair.
Where are you? I can certainly lend it to you or we can meet and you can plug it in and try it - you should be able to troubleshoot without buying a new one.
Pm me if you want to borrow it.
Stringbag.