Here's potential comprehensive plan for everything that's been brought up:
Make a note on Keep Circulating the Tapes
that this trope is for works that theoretically could be released but never were on modern formats (with a listing of the common reasons this happens) or had a small run that's long out of print, making them rare commodities. If they are available, just not in all the regions you would expect, that's No Export for You
. If they aren't available because they no longer exist as far as we know, that's Missing Episode
Rename Missing Episode
to something less format-specific. Note that this trope is only for works not known to exist anymore. If they exist, but aren't being released for whatever reason, that goes under Keep Circulating the Tapes
. Add a section for works that were thought lost, then turned up, roughly equivalent to the section for stuff that eventually got published in Keep Circulating the Tapes
For both, soft-split works which are available, but not in the form people wanted.
For No Export for You
, split by region as well as medium with a subsection for inversion where a work is available, but not in its home territory. If only a butchered version gets exported, that falls under Macekre or a couple other export tropes and doesn't go here.