Sport side mirror 101 for $200 Alex

[moregrip]

Got a few questions on Sport Side mirrors.....lol, I'm learning I really don't understand the details as well as I thought I did.

Is the mirrored glass replaceable? I have a two edge chips on a mirror and has a slight tick to it as it sits in the housing; see pics:






Also, is this what the factory mounting holes look like on a door? The included hard plastic shim/gasket fits the two mounting holes perfectly and the third hole fits the plastic nub I assume for locating the mirror correctly?




If those are the correct mounting holes, it appears there "may be" left and right specific plastic shims/gaskets because the third hole on the drivers side has the same orientation as the passenger for mounting or are they all the same as shown below?



Thanks for the help!