|I like quality too, but sometimes that old fashioned shitty and gritty sound is pretty cool! Very nostalgic. Remember when those old mixes use to be recorded directly from the stage and you would hear everything recorded straight from the microphone? Good times.
Anyway, my point being is that if you can't find any hi quality stuff, there's nothing wrong with going a decade or so back.
Otherwise, consider finding the tracklist and download 320 KBPS MP3s of the music. You don't know for sure what the original compression rate was on those mixes.