If youre ok with mainstream magazines like national-geographic, playboy etc you should take a look on usenet-indexers. With an usenet downloader with rss support you could also subscribe to certain keywords and get the new issues right after release in a separate folder downloaded.
the „archiveteam“ tried this, but it failed, you can read about it here:
https://wiki.archiveteam.org/index.php/INTERNETARCHIVE.BAK