[REQ] Guitar Hero 1 demo for PS2?

I know there exists a GH1 demo that was used in stores, and I know the guy who used to run the old Playstation Demos site had a copy (he said he found it sealed). This thing is almost impossible to find out any real information. A friend of mine thought he had a lead on one, but it ended up being the GH2 OPM demo that is well known. Anyone here got any info on such a demo, or even a copy of it? I'd love to dig around in the files (the "10-song" GH2 demo had 21 inaccessible songs, and even the 4-song OPM demo had a hidden practice mode that was very unique compared to later builds).