Sourcing 1989 Airstream Land yacht door hinges

[Dugo]

Hi all,
I’m renovating a 1989 29’ Land Yacht. One of my rear entry door hinges( upper) is broken and I’m needing to replace it. This is a specialty hinge with the screen door incorporated with the entry door. It’s roughly 4 3/4” in length. I’m having no luck locating this hinge. I’m hoping someone in our group here holds the answer as to where these are available. Thank you!