As I've already stated, the OPs sizing information is wrong...hence my earlier suggestion to fiddle with a calculation tool. Also for the OP, custom cut straight guage stainless steel spokes can be had for as little as .34 apiece online before shipping.
=8-)
__________________
5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life