Jerry,
Doesn't surprise me that nobody here knows about them, most birders don't use large aperture bins like amateur astronomers. It seems that everybody is slapping their name on General Hi-T larger aperture binoculars, from Oberwerk to Orion Optics and even Astrophysics, which sells high-end APO telescopes.
AFAIK, Lunt Engineering or APM doesn't "engineer" these, they just slap their label on them like Obie, Oriion and Astrophysics (and others) do.
Brock