Availability of leather seats

I see that the 2SS package has heated leather seats. However, It isn't listed as a separate option code. Does this mean that you can not order a v6 car or even a 1SS car with leather seats? I hope to see it listed as a stand alone option.

you need a 2ss to get leather, so far anyways

you need a 2ss to get leather, so far anyways

Or a 2LT.