I'm in for buying one of your cases so you're welcome to one of my partially assembled Ergodox's for your prototyping. I have the mechanicalkeyboards.com PCBs with the port expander, teensy, resistors and diodes mounted. No LEDs or keycaps. I also have the Cherry MX Blues off of a TVS-e Gold I can send with it.
When you're done with it and producing cases, you can ship it back to me with the case. I'll, of course, pay for the case and shipping to get the parts to you. I'm in the states so it would probably be faster to get one from Europe, but let me know.