I have bought a number of fake ponies and wigs. Very inexpensive on places like ebay. They aren't as good as the real thing but far cheaper. Therefore I don't mind "using" them a little more.
The place Orca mentioned is good if you have the funds. Very good products. And like he said, if they are cutting their hair out of their choice it's a good thing they get something for it. Definitely worth it either way!