I need at least one new cage nut, preferably a couple, for the access panel in the bed for a 69. I found these that look like they might be the same but am not 100% sure. https://www.falconparts.com/ford-falcon-auto-parts/pc/1960-1970-CAGE-NUTS-p61.htm If they are the same I can buy from there but if you have a couple good used one you know for sure fit a 69 I'm interested.
Here's a closer look. Haven't seen these at Lowes or similar stores or hardware stores but possible I guess.
I found these at Ace Hardware for a different application on mine (pedal mount bracket, and they didn't work- I should have bought the falconparts pieces). The thread size is correct, but I don't think the 'wings' on the sides are wide enough for yours.
Googling the PN (359613-S2) shown on your link to falconparts.com gives several options for this part.
When I was assembling Brittany, I ordered the Engine and Body kits from Dearborn Classics (MACs), which included a couple sizes of them.