hey mate, maybe throw the rear seats up on ebay and see how you go
A lot of jap parts places as well as private sell just the front evo III recaros.. well they used to when I was looking
no one really had the rears. Cvap had a rear seat but had all burn marks from cigarettes so I skipped on getting them.
I looked for ages and only ever found about 2 people selling fronts only for evo III SR3, so i bought a pair and slapped them in with mismatching GSR CC rears. Then finally found a rear seat in penrith(NSW) for evo III, so i bought it - found on ebay
and yes to confirm, the front recaros are a light grey alcantara/suede like outside material, and the inner trim/inserts are a material with pattern. The back part of the front recaros is a dark grey material.
The matching evo iii rear seats consist of the exact same middle inserts which the front recaros have, however the rear seat has no outter alcantara/suede - the outter material on the rear seats is the dark grey material which is found on the back-part of the front recaros (so as to match)
Evo 1 seats on the other hand have alcantara/suede on both front and rear seats