Thanks, Reef Geek! I stopped by Gold Aquariums this evening, and I picked up both of the itty bitty rics. I don't know how you spotted them . . . maybe we should call you "Hawk Eye."
He charged me $20 for both of them (and nearly talked me into a blue-spotted jaw fish in the process). They're so tiny that I had to glue the bits of rock that they're on to frag disks: lest my tuxedo urchins decide to wear them as hats and relocate them.