Check out ansgear.com , i just built a custom flex (lime green / black) with custom stingers soft ears (lime green/ black checker board) and km strap for around the same price as a new dye cam i4. ansgear.com has unlimtied options, of frames, bottoms, ear pieces and straps.
like the guys above have said you will also find tons of used custom flex's in the b/s/t section.
MobScene Pump Team
Alberta Pump club Member