@gsgmfg@fosscad.io did it, the madman. In conjunction with a kind user from the Index's Lemmy instance, he was able to restore almost all of the data from /r/fosscad. There's a bit of a loss in images, but the text -- the oh-so-valuable advice and discourse -- is all there.
And the best part: it's federated between both of our instances. There are now not one but two copies of the data: one local to his instance and one local to mine.
Find it here: !ark@fosscad.io
Holy fucking shit. I thought the reddit was reinstated at first but this is almost as good. Great work guys :D
TBH, this is better. We can now go back and link if we need to.