I posted this on another C3 forum but I noticed people were looking for this on here as well. 

Link to forum is http://www.corvetteforum.com/forums/c3-general/3713588-c3-chrome-door-mirror-template-download-link.html

Direct link to templates is - NOTE - IT HAS TO BE PRINTED ON LEGAL SIZED PAPER IN ORDER TO BE PRINTED TO THE CORRECT SCALE. (the correct size of one line is referenced on the paper so you can double check prior to drilling)    https://www.dropbox.com/s/e2y4pj6z35...lates.pdf?dl=0

Hope this helps some of you.