i was driving crazy as fuck one time and swiped a big orange cone, it shattered my mirror, from the picture it looks like you don't need to replace anything except the mirror itself, if you see the protruding pieces, the mirror attaches to all these. i think it is about 12-18 dollars per mirror. there is no need to tape them
firs push new mirror onto the central black piece and then push at left side first and snap that piece on and then press near bottom and push until that snaps on, clean the mirror and you are done

here are 2 pictures one of where it attaches, and the other of the back of the mirror