I will visit Frankfurt (Germany) in this August and I want to buy two bottles of Schladerer Kirschwasser (alcohol, cherry brandy) near Frankfurt Main. Since I plan to go back to my country from Italy, I have no chance visiting the duty-free store which sells Schladerer in Frankfurt airport. Is there any store sales Schladerer Kirschwasser in Frankfurt?
Since you are looking for products from a specific distillery or possibly advice on premium brandy, I don't think you would be well-served by supermarkets like Hit, Marktkauf, Real or Rewe. You need to track down a specialist shop.
Searches for “Kirschwasser” or “Obstbrände” (fruit brandy) did not yield anything useful but looking for “Spirituose” on gelbeseiten.de returns a few promising results (I can't personally vouch for any of them).
Alternatively, you might also try a large upscale department store. I don't know Frankfurt very well so I might forget a local institution like KaDeWe in Berlin but I would try Karstadt or Galeria Kaufhof.
Following a comment by @GayotFow: There is also a permanent market called the Kleinmarkthalle where some merchants offer various fruit brandies.
In all cases, your odds of finding Schladerer products do not seem very high but you should at least find some other premium cherry brandy and, with a bit of luck, someone who could advise you on the best substitution. If you are feeling adventurous and since you plan to buy two bottles, you could even try two different distilleries!