I remember reading somewhere that yes you can grow on dead citrus branches noting it to be like most demised branches. My only thoughts about mounting on the brances would be the bacteria and fungus they are so bound to attract not to mention the ants.
You know what they say about curiosity, it's hard to part but you might want to try one and see. Go to the depot and get a rescue and give it a try. I would if I could but I can't so I wont...living in a condo has limited my curiousity.
Being in Malabar your familiar with Grant Farm Island on the ICW. My father-in-law lives on the island and before my mother-in-law passed she raised a few orchids on sea grapes and drift wood; they learned how to acclimate, slowly but they survived.
Nothing worse than wondering if it would work
unless you give it a try