I think you can get them from e hobby.com at this link.
http://www.ehobbies.com/rc-ttr-4557.html
If you have mastered a trainer, this plane will work well for you and it doesn't have any bad habbits. I own 5 different bipes and this is my fall back plane. It fits in the back of my jeep along with my Goldberg Ultimate so I can fly more then one plane on the same day.
'course as with any aerobat, you do have to have reasonable competance with the sticks