Gibt es eine Möglichkeit, deutsche Apfelschorle in der Gegend von Texas (Dallas) zu bekommen?

You could probably get it imported but it’s unlikely many will do it. The weight is just way too high. I’m guessing a bottle would cost around $10 if someone were to import and resell.

Source:

German-American that has lived in both countries and occasionally bought something from the respective overseas country.

Light items are easier/cheaper, heavy or bulky gets expensive real fast

Edit:

Pricing like I mentioned..

Almdudler soda (Austrian Apfelschorle) is on Amazon for $29.99 for 4×0.5L

But I also see “Martinelli sparkling apple juice” 12x10oz for $31, that stuff might be quite similar and possibly directly available somewhere near you

Maybe try calling Kuby’s market. It’s in Snider Plaza near SMU