There is more!
In the course of my ongoing research I have uncovered a 72 GMC Suburban. More importantly it is a 10K mile, original condition vehicle with the avocado plaid trim. Clearly (to me) it is a vertical stripe. If anyone has additional information or pictures of this vehicle or the auction please post or PM me.
http://www.chron.com/cars/article/So...ll-5565528.php