Pretzel rolls really do have a pretzel flavor and texture. They make great sandwiches. Use Black Forest Ham, German cheese, lettuce and tomato and perhaps a big German pickle. For the tea, you'll probably want to cut the rolls in half or even quarters.
There are many German cheeses available in the US. These include Allgäuer Emmenthaler which is like a Swiss Emmental but made with cow's milk. This is the perfect cheese for serving on the pretzel rolls.
One of the best places online to order German foods and products is the German Deli. Even if you aren't interested in ordering anything, it is fun to look at the different foods. Be sure to check the candy/chocolate section!
