Follow-up to the above:
It took a while, but gwt has now got things sorted out-- with no help from me-- and is no longer crediting me with nonexistent links. Whew.
Incidentally, that "unauthorized mirror" has recently been visited by users in at least two different offices of the relevant government. But I have yet to get an irate e-mail ordering me to take it down right this second Or Else. ::snrk::
I also found the (real) Wayback Machine's fine print. They really do run on a two-year delay, give or take.