You can make one. Use a container of butter or you can buy one at walmart cut a hole in the side or front line with paper towel and your set.
I wouldn't use moss in it though because some risks of impaction but you could put paper towel over the moss if needed.
This is my setup for Yoji The container bought at walmart for $3.99 cut a hole in it.(red container in there
Yes I just spray the paper towel everyday and change it every friday.Once it starts to turn browny yellow.
Each of my leo's humid hide is made using a gladware type of container. I basically chose one for each that a)fit well in the tank and would be big enough for the leo. Killian loves his, he spends quite a bit of time in it, and I use only damp paper towels. I switch them out probably every other day, and spritz them down in the morning and at nite. Hope that helps! Sarah
I use cool whip or butter tubs. It's the perfect size. Of if you're up for spending money, you can pick up the Zoo-Med Reptishelter. It LOOKS very nice and 2 of my girls have them. They work great. I've also never had a problem with moss, and it holds the humidity much better than paper towels.