i have the "only shreds remains" demo. i'm horribly lazy about sending stuff in the mail though. i also have everything they ever did on cd-r, but the cd-r is burn proof.
i've had the actual demo for years through tape trading. the cd-r i got at a nunslaughter show in nyc a couple years ago. they were selling it along with bootlegs of derketa, treblinka, dr shrinker.
I did better than that, I got a real cd of all their demo and some really Entombed shit. I rule! Cost me like 17 bucks though. Oh well, should be worth.