I have a spare air tunnel and the top plate that supports the nose. These are the pieces that bolt to the core support. They're pretty clean, just need some paint and a few tweaks to be really perfect. I'd take $75 for both pieces, picked up at my place in Bergen County, NJ. I CAN NOT SHIP these, they're too big and heavy. Or, I can deliver in the local NJ/NY area if you cover my gas/tolls. And, I will not separate them, you must take both.
Closeup of the top plate. It's pockmarked (was sandblasted by previous owner) but not rusty at all.
Please post or PM me if you're interested.