From experince, having tried all the recommended ones (other than Pothos) I can say Benjamina Ficus (weeping fig) works best for me. Hibiscus and umbrella plants (Schleffera) don't do well in my vivs for some reason.
You could probably find something at walmart or home depot. One thing to remember though, a lot of stores use fertilizers and pesticides in their soil. It is highly recommended that you repot the plant with new soil. After doing so, I usually let the plant sit in the sun for a week or two before adding it to a cage.