I'm still working on figuring out how to manufacture hardened-surface dies on a small-scale level, but for now, I've dug up some New Hampshire-based businesses that do EDM and CNC.
Check out at least the first 5 and let me know what you think.
Small Runs OK - Design Help Available - Hobbyists & Project Builders Welcome
KDL Mold Solutions
59 S. Barnstead Road,
Center Barnstead, NH 03225