68 vinyl top measurement

[ccargo]

Hey guys, I need a measurement from an original 68 vinyl top. I have three 68's with vinyl tops and only one is original. I am replacing the two non original tops. I have a dimension of 45" wide seam to seam  on the main section of the original top. The vinyl top guys insist that its only 40" wide seam to seam on a 68 top. Does anyone out there still have an original top on a 68 that can check my measurement?

Thanks
Pat