LOL Thanks vw.
One thing I have had success with Kirk is to blend up a paste of assorted seafood, then find a really rough piece of live rock or a dead coral piece and really smear it around, doesn't have to be on thick, just in the crevices pits etc so he can pick at it, let it dry a few hours so it doesn't dissolve as soon as it hits the water, it may interest him, watch your water quality though, you might want to do two rocks and swap them out each day before they rot too much, be ready for water changes. Check in on the Fish forum, I bet you already have though, they might have some other good ideas, I'd give you an aiptasia rock, but my CBB has cleaned them off, I do have lots on the glass and in the cryptic fuge if you want to give that a shot, I think the paste thingy is your best bet though at this point, he probably is seriously in need of more nutrition than an aiptasia diet woulf give him.
Congrats on the Navarchus, I love those things, one cool thing about them is that they don't get huge, I think they top out under ten inches, and it takes a while to get there. If I get lucky and kill all my SPS I'm gonna get one too...