Where can I find a rare Swarovski crystal rivoli?

I am looking for a Swarovski crystal rivoli that is very rare. The color is called "Saturn" and I was just wondering where to go to find it (on the internet or in the "real world" perhaps). Several tries on ebay haven't given me any results so any help would be appreciated!|||You might check flea markets and auctions in your area. You might luck into it. And ask at jewelry stores that sell Swarovski.