Just in case you're not getting many bids:
Based on your website, I'm going to assume you don't have a lot of CNC experience.
The part you are requesting is quite complex and takes several setups. Most people would probably prefer to make tooling for a part like this as well. That's expensive for a low part count.
If you are able redesign this and make it into two more simplified parts, you can probably get a quote that you would be more satisfied with.
Also, your .IGS does not show the side pockets on the collar portion.