Also remarkably similar to the late 1980's Ford Ranger boots I junkyard scrounged to use on my other car (a '67). I don't remember the diameters but do remember for some weird reason each end was a different size and I had to hunt some slightly odd sized hole saws to get them fitted. This particular one is now jammed pretty full with wires for the speaker, power locks, courtesy light, and the remote mirror cable.
They may or may not be good for a '69. My need for some on mine is so very far down the road I haven't even looked at the area.