Nick:
Bobbie’s posting verifies that K-Line did make templates available on their non-defunct website. I did find a reference to Superstreets Templates in the 2009 K-Line by Lionel catalog. They were available online at www.k-line.lionel.com . Obviously that section of Lionel’s website is no longer operational, either.
Hopefully Bobbie’s download will work for you. If not, we could always make our own out of cardboard!
Bill