Halloween costume help, my friends and I are being biker chicks?!?

Well, us six girls for halloween are being biker chicks. We are going to wear knee length leggings with a long red tank and a black leather jacket that on the back of it says something in sparkly letters...thing is wear will we get a faux cheap leather jacket? (we will put the sparkly letters on ourselves...and also what should we write on the back of the jacket?) We will top the jacket off with biker chick looking chains, and fake tattos on our calves. We will also wear a bandana on our neck. Thanks any tips? and answer those questions I asked please...we need help!