I have a friend who is 17 years old, but undocumented. She asked me last night if I knew how she could get it, but I don't.
I've made some Google research but the answers I keep getting aren't really helping me help her. Does anyone know?
By the way, I would get it for her, but I would feel really awkward buying it considering the fact that I'm younger than her.

I believe that with the new rules recently announced she would be required to show ID to prove her age. You say she is "undocumented," but in most staes she can still get an ID.

Would a school ID work?