I couldn't find any 10:1 Lego Hair I liked (and was easy to print) so I came up with my own model!
The hair is cut in half for easier printing and sized to fit 10:1 Lego-like megafigs, namely Julia's megafig (which I used to take the pictures).I also uploaded the un-cut hair.stl if you'd like to cut it yourself!
Supports are enabled by default. Will require some glue to put together, but in my experience both sides of the hair stay on the head by themselves (for the most part). I'll eventually add a version with connector pins/pegs for easier assembly.