Does 8.5 Gb DVD+RW exist? if so, which store sells them?

Answer 1

after browsing the internet looking for such media and checking several major websites that carry high end things like that i think that it is pretty safe to say that it doesn't exist or at least effectively doesn't exist. However for the 8.5gig duel layer disks can be found for less then a dollar a disk when bought in bulk on spindles so that may be an option.

Answer 2

You can buy a dual layer disk at Best Buy, Radio Shack, Circuit City, Staples, Office Max, etc that will handle what you need. Just make sure your DVD burner can handle dual layer disks.