I got mine from REI, it's an outdoor store.
www.rei.com I think is the address. I really like the model I got. There were some other cool packs on sale but the color was so buttugly I couldn't go there. I think it makes the perfect survival pack because it's not big and saggy. I can put quite a bit of stuff in there and it has compression straps. The workmanship is great!
If you get a camelbak don't leave water in the bladder for an extended period. I did that with my mule and flaky stuff formed inside the bag. It was like it delaminated or something. I've never had that problem with platypuss bags but they don't have the hose. I include on in my camelbak partially filled with water. If I go condition red I will fill the camelbak. The omega bags are a great improvement over the others. I got the black trailblazer which is really grey and black. I noticed one ironic thing, the waist strap for my mule (a much smaller pack) was a big one inch mama jama but had thin shoulder straps. The waist band on the trailblazer is small but the shoulder straps large and comfortable. Go to the camelbak site and peruse their models.