The Colorado Threads Project makes Colorado tees.
From their Facebook wall,
"For a limited time if you hit share, and friend request Colorado Threads on FB, we'll give you a coupon code for 30% off your order. While your at it message us your address on our FB as well so we can send you your sticker."
Colorado Threads Profile - http://www.facebook.com/profile.phpid=100002741781270
This offer is only valid for residents of: