jon0,
One of the reasons you are getting such a varance in quotes could be because of the different equipment in each shop varies greatly. If I give you a quote for cutting a 1 1/2 in. keyway it will be higher than the guy that has a Broach because he can do it much faster. That's just an example of what can happen with quotes. Get quotes with the shops that have the equipment to do what you want then you might see less of a spread on the figures.
We all live in Tents! Some live in content others live in discontent.