1992 coupe interior colors:
A = Titanium
B = Crystal Blue
D = Scarlet Red
J = Black
1993 coupe interior colors:
6 = Opal Grey
J = Black
R = Ruby Red
V = Royal Blue
There were a lot of grey interior SSPs. A lot more than red or blue actually.
http://foxchassis.com/vcldata/ssp/ssp.xlsx
Some (unconfirmed) 1993 Nebraska State Patrol units had grey interior. See the VIN project. All other years, confirmed or unconfirmed, has blue interior. Where is this 1992 unit that you saw with grey interior?