I don't keep Chironius but I have seen them for sale on importers' lists. Check the Importers/Exporters section on the Kingsnake main page. Here's a Chironius grandisquamis I caught in La Selva, Costa Rica several years ago.
They are basically like a giant american racer. They all ahve huge eyes and are diurnal, small-prey feeders. They are extremely nervous and prefer frogs, lizards, and small snakes for food. I'm sure they can be switched to mice. Watch for huge parasite loads on imports.