Lets create the PineCom

[KC9UDX]

You can still use Nextel phones off-network, encrypted, and legally.  I haven't done it in years, (no real need to), but I have a box of them for this in case for some reason I ever need them.

That would be something interesting to do

You might be able to find some for sale on the cheap to try it out.  Not all Nextel phones could do this; you need ones with the Direct Talk feature (also called Moto Talk IIRC).  The bad part is having to replace the battery.  I fully expect that all mine need new batteries by now.  They must have been in storage for well over a decade now.