Picked this up directly from Iron Lung Records. Grabbed it largely because it had unreleased Total Control (who contribute a brilliantly minimal Devo cover), Walls and Iron Lung tracks on it. I also figured the output of that label is largely of a high standard and I figured I might discover one or two new bands from it.
The Iron Lung Mixtape Volume 1 cassette put out obviously by Irong Lung Records in 2011. This tape is now sold out, but I have seen copies popping up here and there and it's well worth the time finding one. Every track on it is (or was at time of release) unreleased. Especially worth it for the Slices track "Bottom of the Barrel" a mid paced bruiser that careens along steadily until veering out of control in the closing seconds and the Walls track "Blinding Light of Truth" that drags itself mournfully through it's length like a shambling bog creature. Good stuff. You can buy a digital version (or listen to select tracks) of this over at the Iron Lung Bandcamp here.