Where to download Snow Leopard?

I'm looking for a website where I can purchase and download the .dmg or .iso for Mac OS X 10.6, aka Snow Leopard. I talked to Apple Online who told me they only sell the DVD, but don't ship to APO addresses (I'm currently deployed overseas.) I don't need any ware sites or torrent links, if I wanted to pirate it I would have it by now. All I'm looking for is a legitimate site where I can buy a legit copy of Snow Leopard. Thank you in advance for your help.