There is a HBS locate south of I-80 on 72nd & L, I believe. It is behind "Just Good Meats." It is located in a strip mall. Prices aren't bad, but the dude is a prick. Behind that is the best liquor store I've ever been in. They also sell homebrew supplies. Lucky Bucket brewery is close by and they may have bulk grain you can purchase, as may Upstream Brewing, but I doubt it.