Hi.

to TalkBass.
Don't know about the "real deal" but I had the same idea about my Epi T-Bird and bought a set of black Gibson "elephant ear" open gear machine heads for it.
They didn't fit. Nowhere near even

. The post spacing is much closer in the enclosed ones.
You can always try to hunt down replacement or custom buttons for the existing tuners if the open gearing is not that important.
Regards
Sam