I think the vinyl you're looking for is called Zodiac. I get it from www.garysupholstery.com
. It's $24 a yard there...the cheapest I've found online. They'll send out free samples to you too so you can check out the colors before you buy. It is so beautiful!!
Sometimes if you're really lucky you can find some on ebay. You might want to search for Naugahyde, and sometimes you can find it in the auto section--people sometimes call it 'flake'--I think because it's glitter. It's popular for auto restoration.
Zodiac is really thick and sturdy, and kind of a pain to sew! I use a rolling foot and have to really pull at some of the colors because whatever they use to make it so shiny is a lot stickier than regular old vinyl. But it's worth the extra effort because it is just so pretty!
Hope this helps!
From one glitter vinyl freak to another....