http://www.radisonlimited.com/
Great people. They will quote.
Be specific. draw up a sample that is close to what you want to end up actually doing.
They are too busy working, to bother to make a perfect website. it is better than used to be. We’re lucky to have access to one. (note the old logo, simply dumped into the the top left corner...) This is the source point for more than a few of the more iconic machined chassis that are out there.
The may do chrome plated steel. They most assuredly do aluminum...