Ok after a little surfind I have found a car that's Zermatt silver.
The only thing is it's a 944 and it has 200k+ miles on it's orginal paint so It's kind of hard to get a good basis of what the color looks like. And I still don't know if 911s ever came with Zermatt or not?
But anyways on this page:
http://iginc.alpinedata.net/timmins/ZERM85.5/index.html
That 944 is the orignal Zermatt silver.