I emailed Brian with your question. Here is his answer:
[color="#0066cc"]The parts like the reed, tone board and expansion tube do indeed come from a distributor. The calls are turned from a single blank of wood, divided and then shaped and finished. Then the internal parts and expansion tube are added to complete the calls. I hope that helps. I do have plans to begin building our own tone boards and reeds in the future but when that will happen is still up for grabs. The workmanship and tuning are what makes the calls.[/color]
Feel free to contact Brian Warner at www.heirloomturkeycalls.com
if you have any more questions.