NoVa Quadrotor Frames
NoVa frames are a balsa carbon composite frame specifically designed to interface with the Booz electronics. The NoVa frame is also compatible with the X-BL controller. Price for the kit is set at $150, and can be purchased by emailing akochevar at gmail.com.
Mikrokopter is a popular airframe made of aluminum tubes. You can build your own with material from the hardware store or buy ready made parts from this shop
Asctec sells a pretty and pricey carbon frame that can be bought from this shop