Can’t match 1993 Opal Grey Seat Fabric

It’s a long story but the end result is that I am missing the drivers seat from my coupe.  The remaining passenger seat is original, looks new and has 33k miles on it.  It has hardly ever been sat in and the car has always been garaged.  I checked with SMS fabrics to try to get matching material to recover a used drivers seat that I had acquired but the samples that they sent me just don’t match.  They claim that my interior is just faded but I don’t believe that it is.  You can clearly see brown tones and differences in the patterns.  They insist that this is the original fabric…is this just so that they can sell it for higher than normal prices?  Who knows.  What do you think?