If you live in an area with any blacksmiths or machine shop they
will be able to help- It depends on what you are having done as
well. As well look to your local technical schools and see if they
have a machining/fabrication program- student project work is often
NOT fast- but done well (i. e. under supervision of teacher/mentor).
A light crowning or buff-out of nicks and dings. why not do it
yourself. If you are looking to have something re-worked into a new
shape or larger repair- I would suggest a Machine shop.
Cost versus time is your biggest issue- if money rich and time poor
then machine shop/blacksmith. if time rich money poor consider
educating/doing it yourself or trading for services.
If you are ANYWHERE near Kevin Potter at Potter USA I would give him
a call (Southwest USA area)