I didn't pay anything near that. It may be a little easier on the Busa, not so on the TL as the signals mount on the lower portion of the fender. The pipes mount so high, you are very limited as to where to put them. On my FJ I did as you said though, I just wacked the sucker off. There was just no way to do this without replacing the trunk somehow.
P.S. It's all FYI, I'm not selling anything here.