Vincent,
My horn was in pretty good shape when I finally coaxed it open. The insides of mine look different (not much of a surprise) from yours. Do you know the make of yours?
There was a great rebuild thread embedded in a DJ rebuild on the old CJ3B Forum taken over by Tapatalk. Sadly, I haven't been able to get on it for several days (I hope that's temporary vs. permanent).
I have in the past found information regarding vintage horns (usually referencing Chevy's, Fords, etc) but still helpful. I have also resorted to contracting a fabrication shop to make things when our jeep vendors don't have something (or have it but not correct) and I'm unable to locate it anywhere else.
If no one here has guidance, perhaps you maybe could look at finding another horn for donor parts or fabrication.
Added: The old forum on Tapatalk is again visible! Here is the link to Charles' horn rebuild:
https://www.tapatalk.com/groups/cj3b_bulletin_board/viewtopic.php?p=31965#p31965Thanks, again to Photobucket for making image posting impossible.