I can't tell what that is made of. I'm not sure I'd try to mount an already sick guy onto something that may be questionable. If he goes belly up, you won't know whether it's because he didn't like the mount or if it's because he was just way too sick.
I think your little fella needs roots badly! I've always found that my orchids just inherently would rather be mounted. Even the sickly ones do better but I'd try just anchoring him down to something more natural looking. That's just me. Good luck! Let us know how it goes!