Replying to Scratched GoPro Lens

Hey guys,
Recently I let my friend borrow my GoPro because he wanted to do some filming and what not.  He plugged the GoPro into his laptop forgot it was plugged in got up and started walking pulling the GoPro right off the table and onto the concrete floor.  There are five small scratches on the center of the lens, although they are not really to noticeable(look like small smugges) they get in the way of the image and become more noticeable during good lighting.  Is there anyways that I could fix this myself?  Have any of you tried to fix a scratched lens?  Just looking to see what works and what doesn't.  According to GoPro I would have to replace the entire camera.  Apparently they can not just replace the lens, which is beat.