Could be the case, maybe
is the case.
Bought a top claimed to be NOS years ago, and it had everything in place. Have no reason not to trust the seller as honest and very knowledgeable about NOS parts, and the top was packed in such a way, and in such a condition, that I am pretty sure it was NOS. Maybe he—or someone—bought the top with any missing parts and installed them before storing it?
I dunno, but if there's one thing I've learned with Porsche, it's to avoid absolutes. There's always an exception to what you thought you knew, and this thread is a reminder of that. Very cool.