Outside Mirror circular cap

[JeepKj96]

I noticed that on the drivers side outside mirror i am missing the top cap (see picture).

I was just wondering if there was a part number for it or what the best way to get a new or used one is.

Thank you

 

[jharrisliberty]

My guess would be to just go to a local junk yard and see if you can find one there. That would be the cheapest way.