I cant say for sure the 67 and 68 pads are identical, but I am assuming as fit and function they would be the same because of the same body style.
The reference photos here are from a San Jose built coupe. Its possible, like with so many other things, there was more than one supplier. I dont think enough is known on the coupes so at this point still seeing whats available out there. Feel free to add photos if you have seen something different.