Not common as such, but definitely plenty out there.
Your fender tag should read either:
G33 - O/S LH remote race mirror
G34 - O/S LH remote race mirror
G35 - O/S LH remote chrome mirror
Cheers,
Carl
PS: I also resized your avatar, only minor scrooling now, any smaller and you would not see the car clearly enough IMO.
Up to you if you wish to use it. :-)