I have a surplus lovely ARCA mirror which has been fully refurbished and replated (not by me).
Its not as extreme as the Matador mirror and is actually more sophisticated than the Matador having an internal spring which allows the mirror head to deflect if one brushes against it. This is why it is in 3 parts.
I think the ARCA design is particularly suitable for Coupes and saloons, Fulvia, Flavia or Flaminia.
£100 + £3.95 tracked/signed for post for delivery in the UK.
Chris