Alan,
Actually, it's
www.midwayusa.com for the Midway site. Also, there are many different sporting sites that also specialize in relaoding components. Natchez Sporting goods comes to mind immediately, as I see their adds all the time in Shotgun News, but there are many sources of primers.
Cnemeth, if you can, get ahold of a copy of shotgun news, you won't be disappointed.
Unkel Gilbey