https://topeka.craigslist.org/pts/d/meriden-1967-buick-skylark-gs-rear/7123608741.html Found this while searching for random buick stuff.
That's Mike Garrison(RACEBUICKS). It is listed here in parts for sale section too. http://www.v8buick.com/index.php?threads/1967-skylark-gs-rear-bumper-new-show-plated.354950/