I've got a 1969 180D but it doesn't have a hat shelf. Was there a change between 1968 and 1969? Do you have the part number? I just looked in the 2009 parts manual and couldn't find the part number for the 180.
Murphy, I don't have a part number. I have been told that the hat shelf from basically any PA 28 will fit but that is not verified.
I hope that someone on here will know for sure.