Left door rearview mirror assembly

[Hocky]

Mine is damaged by minor side scrape, but the internals are damaged although it still works. The tinted mirror has been glued over with another clear mirror as the original was difficult to remove. The right side of the front, the vertical piece which is about half inch wide has fallen off and will not re-fit properly. Does anyone know where I can get a new or used replacement part(complete) as I cannot find the exact one here poss. due to being replaced by a newer version which has a narrow right side front piece which won't match the other RV mirror on the right. Also the price will be helpful. How do I remove the left door interior panel to get at the wiring and bolts to replace the left door RV mirror if I find one?

1994 C 180 Elegance automatic(189,000kms still not run in yet!)