To continue my travails:
Httrack didn’t do a great job: It was slow, even copying from the same machine, and it flattened the directory structure of the website it was writing, making it almost un-navigable.
Here’s where Cyotek WebCopy shines: It’s copying the website from SurfOffline’s database webserver quickly, so I should have the entire website re-extracted very soon!
Get thee to eD2K.
They have a smattering of magazines back to the 70s. It’s far from a complete archive, and the scan quality varies tremendously but it’s there.
Otherwise, try to get an empornium account. Nearly everything porn ever is there.