Where can I get some clothes like Sid Vicious and Kurt Cobain wore.? Links? Websites.?

You won't find anything like that at a cheap price! I do suggest you do it yourself. Go to Salvation army or Goodwill or any second hand store get a few items and begin. I would suggest you look up videos on youtube on how to fray or distress or add studs or whatever you want to do. That helps a lot! Goodluck!