You didnt say if you were looking for racing type or other, but Gofer makes a few sets.
You can get them from ebay, (where I picked up mine) but probably available through other sources, if you have a favorite details seller.
Ah No! I have those that your are showing me. I'm looking for solid whitewall tyre markings! There are some in Germany but the shipping is more expensive than the product! As shown on this box art! Thanks for your info!
Pegasus seems to make them, but being in Australia, (or as you mentioned Germany) shipping is excessive-
Maybe time to give the home printer a whirl with some print at home decal sheets?
Good luck-