At a swap meet few year's back i was looking at Mopar literature a guy was selling and came across this sheet. Looks like Customs weren't available till January of 71
Year's ago same situation 2dr car looking for a roof skin. I looked through the part's book and everything i found had the same part number 2dr to 4dr on the roof skin numbers.
Yes the New Orleans car and yes i messaged him to see if he'd share a picture of the tag. But all he said was it's in the database and gave me those numbers.