Reddit reviews A Song of Ice and Fire 2009 Calendar

http://www.komarckart.com/

http://www.amazon.com/Song-Ice-Fire-2009-Calendar/dp/0977933334

http://awoiaf.westeros.org/index.php/Category:Images_by_Michael_Komarck

The Dabel brothers publishing were the ones that commissioned the cover art prints. But their website has been down for a while, plus the Amazon page says they're calenders out of print. Here's the link that announced when it came out. It will be hard to get a calender(specially the limited print one with Ned Stark on the front), but good luck on trying to find one let me know if you find it.