How to preserve a forum running SMF 1.1.21?

I have a forum I used to post on that is on its last legs. It's gotten so bad most images haven't been loading. There is a ton of history I need to save as the info in said forum doesn't exist elsewhere.

I emailed the admin but no response yet as it appears to be tied to the forum's domain name.

So I turn to you: How to preserve a forum running SMF 1.1.21?