What unobtainium parts are needs? starter list

Maybe not a reproduction piece...what about someone building a N96 unhood pieces for a dual scoop A-body hood? Broken down they aren't huge. Just thinking outside box. how about two-piece radiator shrouds?
Now this is something I have been thinking about designing for awhile but between my health issues and my 3dPrinting business it hasn’t given me much free time.