just got a 1988 GW a week ago
i like the OEM carpet best too
the previous owner put the new low pile in the one i have....
this has been an issue with the 1979 silver anniversary trans am too...
they came with shag, ACC used low pile until a few years ago on their repro sets,....
then, they did a fairly accurate duplicate of the original shag
and most carpet sets are made by ACC in Anniston, Alabama
maybe they can do the same for GW's ?????