On Facebook. Couldn't figure out how to post a link. Here are some screenshots.
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Nope.
At this time, the latest known '69 Z/28 is about 900 units later than N710617. It is possibly what got me started with '69s, as a long-time friends' cousin bought it new in Milwaukee from Humphrey Chevrolet. 57 57 723 X77D80. Only elective option I recall is an AM radio. Still exists far as I know, was for sale a few years ago. Now messed up with retrofitted options.
To be clear, there could be one or more later than the Humphrey car.
There was an ebay auction back in Dec 2006 with Vin and tag for an X33D80 car 9N711870 so thats 52 from the end
Thats the latest one I know of, although the car is no longer with us :)