Thanks for reaching out, I'm so sorry to report that I don't have template files available however by using the exact sink you received you can achieve the same thing:
Put sink right side up on top of the countertop, exactly where it is to be installed, have an assistant firmly hold the sink in place, with a pencil scribe around the perimeter of the basins keeping the pencil against the basins, now add 1/2 inch painters tape to the outer edge of the pencil line. Review the outer painters tape edge and spot check the sizes, if all is accurate do the cutout along the outer edge of the tape