RG320,
Welcome aboard and congrats on the find. I'd much rather have a rust free body over a running 320 any day as I have a few cancer patients.
Contrary to what some might say - Mechanical parts are available and the NiCo 320 forum is a good place to start. Sorry about the windshield, and yes, this is a tough one to find, but we can help get you up and running.
I'd recommend just starting your own thread as you work through the issues of getting your 320 up and running. This will help us all track your progress and narrow the 320 crowd directly on past repairs and current issues. I've have overhauled two E1s and Steve in OK has just finished up his engine rebuild on his NL320 so there are a few recent/newer threads on the E1 engine.
Let us know where we can assist and again, welcome aboard.
Li'l Truckie