Neither did I, I have hunted around the net, and the only thing I can find says there will be a solo album, no title given, but nothing about 5.1 though. I like the RPWL 5.1 releases, so its one of interest should it appear.
Just found the 2-disc set new on Amazon for $13. Picking this up just to support the band. Their message hits me where I live and the music is great.
If anybody has any information about a hi-res version, please let me know!