Wow!! I didn't know that there were 'Treps made WITHOUT folding seats!! (J/K)
I guess you just have to keep scouring bone yards til you find the color you want. I wonder if you have to cut any sheet metal away behind the seat back. A quick unbolting of your seat back should tell you...
Nothing is necessary, it is a direct drop in. '02 and up have 4 bolts to hold the lower edge of the back in place, previous years only use 2. The extra two are for added safety .
Either will drop right in place though. Just put bolts in the holles to seal them if you get the older one.
If memory serves, they were optional on SE, standard on ES and RT & SXT.