The Flaming Lips - 2nd Cassette Demo, 1983

Again, via Exclaim!. This is blowing my mind - Kinda Gallon Drunk, kinda Butthole Surfers. And if you notice, I believe that is not Wayne on vocals but their original singer, Wayne's brother if I remember correctly. Details, including a list of stores stocking this 7 inch are here and there's another link on that Exclaim! link above.