https://www.ebay.com/itm/354640277050?hash=item5292352e3a:g:wVEAAOSwcHJkC7Bp
At that price, I'm not sure one can use them. Once you put them on a car, they become used and less valuable. The irony of NOS parts. That makes for some very expensive cardboard boxes.
There seamed to be enough of these originals to go around. If date code is important to a buyer, patients can save them lots of money.
In the attached image, there are two others sets advertised as NOS for 1/4 the price. They can be found for less money.
Cory
Not all the 67's got the C7ZE ones.