I get dried papaya at pet store it has nothing added, specially sugar.
that is the problem I run into, most dried HUMAN fruits have sugar added, this is bad. way to fatty for your gliders. Vet even said that dried fruits have lots of natural sugars, so to much can be bad for your glider.
As for unsulfured, that I have no idea, sorry, just wanted to let you know about the sugar content problems.