Need screw for propguards. Same as on picture but 2mm longer.

Info about webshop. Direct link. It would be great.
metric info (desired screw)
Head 4.7mm
body 3.15mm
screw 2.5mm
lenght 12mm (orginal 10.6mm)

I think these are the same screws that come with the quick release propeller kits and they all come with two spares. Might be worth trying as they cost $3 each I think.

Check this link:

http://store.dji.com/product/22-quick-release-rotor-adapter