marko,
I definately would like the rear fender "flamed". I have even looked at flame graphics that I could install just like the graphics they put on tuner cars.
BikersEdge here in Wichita has a couple of guys they use for there customs (See American Iron Horse Magazine, I think august's), and they said about 800 buck for the ghost flames on all tins. They can replicate the Triumph patern, which I really like.
I have thought about doing something different in the mean time on the side cover. I think that if it replicated the silver swoosh on the tank outlined in a wide blue stripe with Bonneville America in the silver might look really good.