I did the leatherseats.com perferated in my 92 It turned out great.
but was to soft feeling for me. Leatherseats.com offers a more expensive version of real Italian leather which make the leather harder vs softer
I like the harder leather in and out of the bedroom.
the one thing I noticed about the NSX seats is the passengerside seat has a different power plug than my 92 I can only confirm from the years I have.
the 2004 is different power plug, also 2002,2003 are different
the driver seat power plug is the same from all years. passenger is not. I may have that backwards though
if you find newer seats you will need to cut the harness from your old seats and add it to your newer style seats.
this has nothing to do with the leather fitment though I like to rant off into another direction LOL