KDX 250 graphics are not avalible on the market so me and my riding buddy made one kit for his bike with the help of our local stikers shop for 15 $us. Look at this, maybe it will give you idea to make your own kit!
http://groups.msn.com/KDXRidersCommunity/danielridingbuddybikeupgrade.msnw?action=ShowPhoto&PhotoID=565
http://groups.msn.com/KDXRidersCommunity/danielridingbuddybikeupgrade.msnw?action=ShowPhoto&PhotoID=565