eBay and C/L Listings
There's a 1969 GT for sale with the original split front bumper and flat rear panel (no indent behind the license plate) on Craigslist in Santa Barbara! The seller is asking $2,500.
https://santabarbara.craigslist.org/pts/d/santa-barbara-1969-opel-gt/7071744622.html
(The pictures I've included...