This is highly inspired by KDan's Eachine Racer 250 Battery Tray http://www.thingiverse.com/thing:1289398 Great design but unfortunately it will not work for my quad since it came with the SPRacing F3 Flight Controller. One of the support legs of KDan's battery tray was blocking the USB port of the controller.
I modeled this entirely from scratch, verified all dimensions on the quad itself, printed prototypes, and ultimately changed a few things (like the mounting legs). I did duplicate one feature not knowing exactly what it was for (the two tabs sticking down in the battery area) in hopes that the part will have greater utility for other people. I suspect it is for one of the other available controllers and was unnecessary for the F3.
You will need 2.5mm hardware for mounting the battery tray. 3x 12mm bolts, 1x 6mm bolt and 4x nuts.