I agree with Julia, they are also easy to make DIY. I made mine using the mistking nozzle attached to the bottom of a plastic tuperware flipped over and attach it to the top of the cage. You just have to have a good place to place it over, so I have it ontop of a hanging pothos.
Also I'd like to see some better pictures of that great cage!
Thank you....
And everyone else. Water does go almost all over the cage since I have two nozzles and a MistKing system. I think I'm going to try piling on some fake vines in the corners and see if that helps. I may try the water heater as well...