Does anyone know where to get blank gamecube discs?

You can't buy them. The discs are a proprietory media, licensed to Nintendo only, from Matsushita.

ive read a few posts saying they are available but expensive

Mini DVD-R's are availbable but expensive... whether or not they can be read on a gamecube, is another matter. You would have to get a game cube game on one first to test it and as far as I know, no one has been able to dump a GC image yet, so getting the media would be kind of pointless.

Yup you can buy them .. they arent THAT expensive (10 for $30) someone sent me some the other day.. but I dont have a gamecube .. and i dont think you would be able to boot them without a modchip :)

but what kind of disc are these guys using in this video to play these games?

http://image.lik-sang.com/content/cubehack/geinkiu_rompia.wmv

http://image.lik-sang.com/content/cubehack/BMM_GC_HACK.WMV

Can't be bothered watching those videos, but I belive even the guy that made the first one admitted it was a fake.

Kila_m,

do you know where these disks can be bought?

some sites on the net, seach some e-shops, u sure to find em

yeah those stupid vids are FAKE!