One of my 3A's previous owners drilled a hole into the windshield metal and applied square truck mirror and bracket. I've been using this for a while, but would like to consider putting on and original style mirror and and extra for the passenger side. Is there a specific style for the 3A, or would the same used for the GWP and MB be correct? I also do not have any visible mounting location on my body. Any information would be appreciated! Thanks in advance.