A lot of breweries are going to canning beers. I don't know if its cheaper but a lot do it because its easier to recycle thus better for the environment. I would look at your local specialty beer/wine store and see what they have. If they don't have anything ask them what their distributors have available. Here in MT we have a ton of breweries canning. Two of then right up in Bitterroot Bulls neck of the woods. BB, I don't know why you're wasting your time with Ranger when you can drink Doublehaul and Bitterroot brewing beers. I'm just kidding. That new one in Stevi wasn't spectacular but I had it at a beerfest and I was several beers in so my judgment may have been a little...flawed.
As to the canning question, it almost seems like most new breweries are canning right off the bat instead of bottling. I just named three breweries within a short distance of missoula that can. There is one outside of great falls, one in Bozeman, Big Sky brewing as mentioned by someone else....I would be surprised if you didn't have some local places canning where you live.