I can get some Velcro straps from a local dealer, as well as the heat shrink.
I found some spare arms, it says it's for the qav250, but it looks exactly the same as the one on the nighthawk. http://goo.gl/Nu5vBE
On hobbyking.com they sell these 1400mah 3s batteries. http://goo.gl/eczwhf
I could...