I know that the first thing you're gonna say now will be 'wtf', but there you go, <a href="http://darkwater.free.fr/v2/index.php?page=detail&relid=1399">the Sonic CD 920 beta BIN/CUE</a>. Why did I waste my time to get a redump of a beta that is ALREADY released? Because the already released version is the iso/mp3 bullshit, which is not lossy, and there is 122 million reasons why you should prefer BIN/CUEs to ISO/MP3s. Ask any roms/isos collector, seriously. It's legit, dumped from a real prototype. Have fun.

PS. Sorry for the rare updates etc. but I'm on a trip in the US. And I must say I'm enjoying it, especially the rollercoasters ;) 