Does anyone make a correct reproduction floor mat for the 66 chevelle SS? I see the year one sells one JM486BLK. But they list this as an excellent reproduction for Impala, Chevelle, & Nova, with no cutting or trimming. I have heard that this is the correct size for the Impala; but not for the chevelle. Anyone know if that is true? Anyone know how close this is to a NOS mat? Or what the differences are? Thanks. 