1972 Duster ABS Headliner question

Well, Sunday has come and gone and we are no closer to getting the ABS Plastic, cloth covered, headliner to fit into the 72 Duster than we were last week!
We have done every measurement we can possibly do - - we measured the distance between sun-visor bolts in our 71 Duster and the 72 Duster, they are the same. We measured from the dome light to the sun-visor bolts in both cars, they are the same, ect....... BUT the head-liner we are trying to install is inches TOO WIDE!!! This is the head-liner we ordered from Year One listed as fitting a 72-76 Duster. NOW WHAT???? Will let you know when we figure it out!!