You can just tarball the files up and then put them on a thumb drive, or drag the file from the VM to your desktop (or wherever) if your software supports it. That said, I'm not sure offhand if Armory will run on 12.04. I remember there being some trickiness necessary in order to make Armory work on 12.04. That code is gone now. (Maybe there's another workaround I don't know about?) I'm inclined to say that usage of Armory 12.04 is a "caveat emptor" kinda deal, since it's no longer supported, but that's goatpig's call.
That's kind of what I figured. I'm just going to go ahead and get a cheap 64-bit netbook and move over to that.
Appreciate the responses.
if it saves you some research time, I was in a similar position and found that the HP Stream 11 is 64 bit and will take 16.04 with no problems. It did seem to need the noasm version of armory tho, which surprised me. It's also very cheap atm, with plenty of refurbs/returns on the bay. I also liked that it has an A4 footprint so will fit into standardised secure places...