Or have a solid understanding of what you want and know how to explain it. Draw it on paper with measurements and angles (bring pics of what it is to go on) and go find a small to medium shop. Most places are extremely cool and helpful, and lots are motorheads too.
Just remember, these places get alot of kooks looking for stupid stuff like Subaru driving greenies wanting to know if the shop can weld the burner on their coleman lantern for free because they don't want to buy a new one (witnessed that one myself!).
So just be respectful of their schedule and whats going on when you walk in their shop, listen to what they tell you, answer what they ask you, and chances are they will do it very reasonably and with a smile. In other words, go see someone like F-Bomb. That way it will be done right the first time, get done way faster, with no waste, and it look professional. Crap, it will probably cost you less in the end.
BHM