Matt, I bet if you go to some swap meet like Carlisle or Hershey you can find a complete cowl cheaper. I even see them on Ebay from time to time in the couple hundred or so dollar range. Like I mentioned, I only suggest this route vs building one from new parts because of the cost and the work to get one together.
We spent a little more time last night and today putting Dan's cowl together and I think we have finally figured out how it all goes together. Good thing we have the other model a sedan to use for reference, because it would have been really tough without it. We keep taking measurements off of it and transferring them to the new parts.
Here are a couple that are on Ebay right now:
model a cowl, Parts Accessories, eBay Motors items on eBay.com
eBay Motors: 1930 FORD MODEL A COWL - GAS TANK & MORE ! (item 120265022886 end time May-29-08 21:12:57 PDT)
These aren't near you, but I bet if you keep your eyes open you will find one.
Don