it seems that your mirrors were swapped at one point or the other. the left one, with "white" tint to it, has a fat lip around the glass adge, which is symptomatic of el.chr. mirror, while the right mirror is just heated with skinny lip around the glass...

you can get the el.chr. mirrors for aobut a $100 a piece off the ebay, from latvian breakers - put a search on ebay and wait. or, you can forgo the function and go with just heated ones, like RB said... I got mine on the left side for $100 delivered - very pleased... i've had ashperical mirrors on my E34 and E39 - excellent safety feature, that is almost standard on euro models...