How to Make a Cyber Respirator Cheaply

This Is For Anyone who can't afford to buy cyber respirators because they are just too darn expensive!

what you will need:
a black respirator, easily found on ebay for £3-£6
craft foam in you selected colour
thin tip black permanent marker
scissors
a design to go on the respirator
spikes(optional) 

unscrew the cartridge on each side like on the picture

draw around the part that was screw off and draw chosen design on, then cut out

put the foam piece in the cartridge part and screw back together

i havent glued spikes on :) 
or you a drill a hole where u want the spikes and screw them in :)