Tires
#3
Racer
dye pencils are available, in many colors. Use them to make your own "white letters". If it looks as corny as I think it will, at least you'll be able to wash the dye off with a little lacquer thinner. If it looks as good as you are imagining, try calling Coker Tire and see what they can come up with.
#6
Le Mans Master
No tire maker makes a lettered tire in a size that would fit. Just finding ANY non-factory size tire combination that doesn't cause issues with the active handling and traction control is difficult and requires careful selection.