There's an '08 CBB Female Rhino Rat on KS for sale
http://market.kingsnake.com/detail.php?cat=64&de=757632
I don't know much about Rhinos/Mandarins (out of my price range), I think most of the Ratsnakes are pretty easy husbandry wise. I have a Blue Beauty and she is feisty from time to time, but has gotten better as I handle her more. If she's out cruising around during the day and I try to get her out, we're going to have problems. If she's in a hide and I try to get her out, no big deal and she's fine once she's out of her cage either way. She's more secretive too, she won't eat if you watch. But she's never refused a meal...as long as I leave her alone.
Check out ratsnakefoundation.org:
http://www.ratsnakefoundation.org