Most grocery stores have it, Jude. Its generally by the spices in the baking aisle.
![Smile :)](./images/smilies/77smile.gif)
The root beer concentrate (or extract) is what gives the cookies the dark brown color so if that's important to you, grab the dark kind. Some brands are clear...which tastes just fine too.
Lalaith, I'll check out your boards! Feel free to look at mine...
http://pinterest.com/nellyd87/
I used the site for a lot of my wedding ideas and have gotten even more into it with all the decorating stuff since getting a house with Borry (its been forever since I've thought of his username on here...weird!)
We have a pretty small kitchen without a pantry/closet-thing so we made this a couple Saturdays ago and it has helped a TON. Love it.
http://pinterest.com/pin/186688347023825363/