Hello! Welcome!

With respect to question #1, your best shot at an answer is to hire a psychic! Nobody claims to know what's going on at the store. For what it's worth, I have received several "out of stock" items in the past, but that could be pure chance.

Carry cases? IIRC, there are none available in the U.S., and only a few left in the U.K. for non-North American customers. There have been recent threads about this. Such is life, I guess. Alternatives? Search on "pelican".

Trunk mount? I think several folks have attempted this, perhaps even with some success, but the VFD display is not built to do this (and maybe not capable, either). There were several discussions; try searching on "extending display". I looked at those threads and quickly concluded that, as a mere mortal, it wasn't worth thinking about. Easier to start a new company and build one from scratch!!