The Real "Old Dusseldorf in A Long Neck" Fictional Beer made in Maryland is really MBC, The Maui Brewing Company. Or is it? I waste my time investigating. and come up with this cool article from someone who did the same.
A few more hints
Someone says that there is an Old Dusseldorf brewed in Manhattan Kansas. However, I don't find it on their site.
And here's the famous Maui Brewing Company site. (any chance for me to shine on my old Island home)