Eee, poor little guy. If possible, placing his cage and pouch outside with his favorite treat inside might work. They're very territorial and he would be wanting to find a place that smells familiar. And, well, that's all I got. How do you find a tiny tree-dwelling creature if he doesn't want to be found?
Thanks. I got a little bit more information. Apparently "Monster" has tried to get back to the balcony about a week ago (?). That’s where his cage is. There’s a large tree in front of Sheila’s condo and at least one of the branches almost reaches the balcony. Monster was on a tree branch and jumped to the balcony but fell in the attempt. Monster was able to glide to the ground, after she couldn’t reach the balcony. I think she/he scurried back to the tree at that point.
Maybe buy a really really large fake plant and Monster can land on it?
Yes, if he's been seen in the area. . .they should put some kind of branch or board or something he'd be able to land on. If he's good at hunting he should still be alive, but they better hurry before first frost kills the bugs!