I've seen hypos advertised on KS a time or two in the past, but you're right, not too much else. The hypos look the nicest in my opinion.
Rainer did produce some triple hets for Peabino Mosaic a couple years ago. I, among whomever else out there, picked up some. Now, a couple years later, these snakes should all be about breeding size & age. Mine is. Notice I said "is", rather than "are". Unfortunately I lost 2 out of my 3, in my big bbq last year, so all I have is a lone male that's about 3-4 feet. I would imagine all of these other clutchmates Rainer produced and sold should be producing some new visuals any season now. I also don't think Rainer's very interested in working with them much anymore...
I'm pretty sure Gourmet Rodent led the initial charge on these and really popularized them.