I am thinking that since your pictures point to early 70 cars have dark blue headliners and the 69 NJ's cars also have dark blue, it is a pretty good chance that an early 70 NJ car would also have dark blue.
When I posted for help, I was also only thinking about 70 cars. Since I didn't get as many responses as I thought I would. I will use the 69 NJ cars and your 70's as the basis of my decision. I am thinking there just isn't many blue interior cars left.