TTBOMK they're gone. SN management may have them on disk, somewhere, but the archives, the server they were on, the software that organized/displayed them: All long gone.
Yeah, it annoyed me mightily when they did that. To add insult-to-injury: Absolutely no notice whatsoever. I almost started-up a new P30 mailing list on my own (actually have the software running and ready-to-go), when I found that everybody had already pretty-much migrated over to the Pearson mailing list on Yahoo!.
That was a very valuable P30 resource. Now gone.