Dave
Heres a link to Ebay if your interested in Alice packs, I have bought from them and they seem to have great prices, just make sure to check item descriptions to make sure everything you want is included in the auction.
http://stores.ebay.com/A-Z-Army-Navy-Military-SurplusI know a lot of people that have Alice Packs and love them, myself I go with either Maxpedition, or Camelbak.
I also have the GI Duffel bags in case I Bug Out that way I can throw stuff in them too, besides the BoB's