I broke my koss dj100 headphones plug.?

I love these headphones, and tragically i broke the end plug off. I stripped the wire off and found one green, one red, and one black wire, how do i fix this, and what kind of plug do i buy? I spent all my money on these and im broke, and im 15, with no job so i can't buy any new ones. Help would be emmensly appreciated. heres a pic of the inside wires, i know this is different that regular head phones so this is why im asking. a href="http://s1107.photobucket.com/albums/h383/kossheadphone/?action=view¤t=110218-140503.jpg" rel="nofollow"http://s1107.photobucket.com/albums/h383…/a