I do have a set, but sadly they are not for sale. I am saving them for spares for my 2 Pintos that have pop outs. Both my Pintos have the style that mounts via pop rivot to the inside of the pillar. Those would be the easiest to mount if you want to ad pop outs. There is just a metal tab the window attaches too and that tab also attaches to the pilar.
I have never messed with the other style. The kind that go into the pillar. Most I have done is cut a set of wagon pop outs out. We cut the pillar to see how they mount on the inside of it. I still haven't figured out a way to remove them with out breaking the plastic mount they set in.
Here are few pics.
This is the easier pop rivot style. Can't say for sure but I believe these are 70-73 only. Someone correct me if I am wrong!
The next pics are from a station wagon, but I believe the 74 and up sedans had this style pop out hinge.
That plastic thing is the part that breaks 9 times out of 10 when trying to remove them. Still don't know how to do it with out breaking it, besides cutting the pillar out!
That is the window part.
This is a shot of down in the pillar. The arrow points to the plastic piece that is holding the hinge in place.
Good luck on your search for pop outs. You may want to try Fred Morgan here on the site. He is the parts guru!