If you were looking for the Mac Eyeshadow Pan Pro Palette, Mac Cosmetics have two sizes available. One is the 15 Eye Shadow Pan Pro Palette and the other is the 4 Eye Shadow Pan Pro Palette.
One way to get them is online at MacPro.com if you have the Mac Pro Membership or you can visit a Mac Pro Store. If you are lucky enough to have a Mac Pro Store near you, you do not need the Mac Pro Membership to make the purchase. The Mac Pro Membership just allows you to get a discount of up to 40% or 30% depending on your membership type. Since the store is not available to all, you can call for mail order at 1-800-387-6707 x6. Although calling the number and getting a rep seem a little hard and most likely you'll need to leave a number and have them call you back.
The other way to get them is on ebay. There are lots of listings with the 15 Mac Pro Palette and the prices varies. To be honest though, you probably will get ripped off buying it there. Some prices are listed for $19+. If that's the case, don't even bother. The price at the Mac Pro Store I believe was $12 (I don't remember but for sure less than $15!!). Just be careful if you decide to purchase from ebay though...lots of fake mac stuff out there.
The Pro Palettes are great for organizing single refill pan eye shadows or for eyeshadows you decide to depot.