Ola Jason
Maybe it is an idea to take a thin sheet of evergreen and one of those heaters that you use to strip/burn paint of wood... It looks like a industrial hair dryer except you will not have to worry about your hair for some time if you mistakingly take it to dry your hair.
Heat the thin sheet of evergreen till you see it bending that should be enough to fold it around it.
I have made several things where bending of evergreen was required I usually have a tealight or two in my workshop and use it for bending the stuff. Below is an example of evergreen bend above a flame from a tea light... Hold it just that far that it does not catch the flame and when it gets soft enough it bends out of itself in a nice curl
Another example is this loungechair that I made for a good friend the seat and the legs were bended using heat from a tea light. The back of the seat was heated and then modeled on a Humbrol tin two times to get the round shape but also a bend in the back itself so it was leaning a bit back


I hope this helps you a bit further... I'm sorry I can't tell you exact temperatures but it is mostly a hit/miss technique. Just try it... You will find out quite quickly when you were to close to the heatsource
With friendly greetz
Robert Blokker