Looking to buy a spindle motor for a medium-size CNC mill. The mill will primarily be used for woodworking but it will also be used to cut metal so it needs to have the precision and power to do so.

Here are the general specs I am interested in:

- Power: 5-7 kW
- RPM: 20,000
- Motor: AC
- Tool Interface: CAT40 with collet style clamp (not ball type)
- Body Style: Box
- Cooling: Air or Water OK

I am flexible on whatever is not mentioned in my list. The "custom" part of this thing is that I want the tool changing process to be something I can do by hand until I get to the point of integrating an automated tool changer. I prefer to do business with an established and reputable US-based shop but I'm willing to talk to anyone who can provide what I'm looking for.