Easy stuff here.
I fixed several of these in the past. You can slightly wet them and pull out with a vacuum. If they have any marks, go to a hobby store and buy some black acrylic paint, the type used to pain on canvas. It will cost you 89 cents. Just paint them and they will look like new.
They can also be replaced very easily. Cut out with an Exacto knife and glue in new ones with Elmers glue.
The rip in the woofer can also be fixed by gluing on the back. Use some lightweight material or cloth. Again, paint the front and they will look like new. Before anyone says anything, yes this adds a little weight, but you will not hear any difference.