I do not believe the seatbacks come in CF. For a cab I would definitely do something with them - either painted or all leather.

I have the basic CF package and CF switch panel package and it looks great. Everything else is leather - rear center console, door finishers, etc. I think (IMHO) there can be "too much" carbon but if you like it, than go crazy!

Yellow stitching is available. Just be sure you do a lot of research so you make sure you check all the right boxes. If not you will have some items that have the std. silver stitching like the shifter boot and e-brake. Should look great but if possible you should try to see some deviated stitching in person.