Those red bull graphics will proboly be pretty tough to get if even possible. All redbull appearel and logos and all that jazz is very very hard to obtain and when you can pretty darn expensive. I know that you could find the redbull graphics for the bikes at one point in time but were pretty pricey, especially for us from the USA due to shipping and exchange rate due to them being sold out of europe.
Knight's graphics were made specially for him by PG. www.PowersportGrafx.com. I'm not sure you can acquire them because of licensing issues, but check with PG and they might be able to put something together for you.