Hello & welcome rik, I have no idea where to get tresser optics but I have some questions for you:

1. Are you driving that Audi 100 every day and it's OK for local policemen that you are 17 years old?
2. Are you typing in English here, or you use the automatic translation from Russian?

Domas

Oh it's impossible to find Tresser taillights , maybe Chinese will start producing them someday , like they do with the rest of popular brands...  For now , the only ones you can try to look for are Treser taillights
It was a joke , for sure. Kind of a lesson as well

By the way , hello rik , welcome to Lithuanian Audi Club!