One off complicated parts means a lot of shops will not care to even give you a quote. The ones that will are going to have high rates.
As was said it isn't just put it in a machine and it's done as was pointed out before. There are costs to make the code to run on there machines cost for fixturing, person to run the part, materials (not really going to lower your cost if you provide it ), tooling that may be needed to make the part.
In short unless they are a shop hurting for work they could care less about doing a one off part that is nothing but legal problems for them