Hello JB -- IIRC Andy at
Inland RV went to the trouble of getting a source for the hardware. That would be a fall-back idea if you don't get any further. I'd recommend calling them. They don't do email well when they get busy -- and it
is spring! Ask for any how-to info they have. Andy really knows his stuff if you are patient enough to thread your way to a time he could conveniently talk. If you buy from Andy I can vouch for him being quite helpful.
I trust you've searched these forums for other threads with a variety of keywords. Though I was not interested significantly I do seem to recall some threads with photos.