The Stovebolt Site Forums The Shop Area Paint and Body Shop am I able to check for the top hinge nut without cutting cowl?

So the parts came, and when I checked the hinge, I learned that THREE bolts hold it in place, not 2. The worst part is, I need the backing nut/block nut/whatever you call it for the UPPER hole (shown in pic). Where can I buy or order those? I don't have the means to machine one myself.