Sierra Trading, Sportsmans, Jaxs, Cabelas, REI, and many more for boots. You can likely get a better deal online...than some of the shops. Possibly try them on to get your size and then order them. I know it's not good for the store but I've done it a couple times. You can get around 1/2 price with coupon codes at Sierra Trading and a few other spots.
If you live near Denver you can go to the Kifaru store for packs. The same places mentioned above may have other brands.