Haven't been able to find much info about this except for a pre-order page on Soundstage Direct which, of course, doesn't have a release date attached: http://www.soundstagedirect.com/nirvana-from-the-muddy-banks-of-wishkah-vinyl-records.shtml
Anyone heard anything else?
EDIT: Release date appears to be 2/26: https://www.srcvinyl.com/music/nirvana-from-the-muddy-banks-of-the-wishkah-2xlp.html