Custom 205mm (diagonal) quadcopter 4.5 mm thick bottom plate with 2mm top plate/case and bttom plate. Holes for 1806 ~ 2206 motors and CC3D/Naze32 holes in the center. Comes with 3 different angles for your FPV camera (40.4, 33, and 24.2 degrees). Can only swing 4" props.... oops. Available in Strong White and...Elasto might be interesting? ha
Just use normal 30mm Aluminium standoffs between your base and top plate/case. Then on the bottom I'd use 5-7mm 3M standoffs from the base to bottom plate.