Hi,
Nice try, but no. Immediatelhy following the words you quoted, was this gem: "(For older items that do not have four-letter Availability ratings, a code of X in the last of the three-letter codes indicates an item that has gone extinct before the Dark Age setting, unless the gamemaster decides otherwise.)"
You'll, of course, be left with whatever the last-known availability is, but we won't be racing to implement this particular change as an errata.
Thanks,
- Herb
