I make a variety of custom aircraft and aviation themed decals, some of which include the O-1 Bird Dog decals listed here. Decals are available in a variety of sizes and colors, and are made of outdoor vinyl rated to last many years.
Decals can be purchased through my Etsy shop at http://shop.mattplaster.com/. Please feel free to reach out to me with questions or special requests! firstname.lastname@example.org