Check the t-amp link in my sig. They've just started doing really nice cases from somewhere in Italy. I got the replacement front panel along with one of the cases - the amp now matches the DAC. They're quality enclosures, a significant step-up from Hammond cases.
Don't think they can help with milling. I'm leaving my blank (it's a power amp, so that's ok), but I wouldn't like to attempt touching the front panel myself, it's solid.
The cases are made by these folks ...
Hi-Fi 2000.