I created a Github Pages clone of the archive last year. It pulls most of its data straight from the archive.org datadump and the rest of it is hosted by Github; there's no database and it costs me nothing to run, so it shouldn't go down.
It's similar to smeghammer's web app (which I wasn't aware existed at the time), but is implemented completely differently.
https://wadarchive-browser.github.io/
(Note: you need a relatively recent browser to access the mirror.)
Screenshots: