sometimes it is better to just do it yourself.

With a good real Dremel tool (not a chinese knockoff) you can use a small round bit to cut away what you want in a somewhat crude way... then come back with a larger bit with a metal sanding "tube" and clean up the rough cut you made. Then finish with some fine sandpaper until it "looks like it was made that way."

Practice a bit to get the feel of the tool.... it can and will get away from you depending on how you attack the work... it will want to pull itself in one direction or skitter off in another. Work slow, take small "bites." Dremels are nice things to have.