Your 1968 Z/28 dealer sales invoice is on Ebay...
Full VIN: 124378Nxxxxxx
Seller id: allgm3310
Seller location: Folsom, PA
This seller won't disclose the full VIN on the invoice, but will check to see if your VIN is the one
So, if you own a Norwood built 1968 Z/28 that was originally sold in Pennsylvania with the following options, send him your VIN. You might get lucky!
Options on invoice: