remote keyless entry

I have a 2011 dodge nitro SE and have been trying to figure out how to get a key-fob for keyless entry. Any help would be much appreciated!

So I've had my Nitro for a couple years and I flippin love the thing. I've had a couple minor issues, nothing crazy (thankfully) but one somewhat superficial problem has been bothering me since purchase. A couple months after I bought it, I noticed that the unlock button on the key fob would...