There's something called "sos tatarski" (dressing for salads etc.), but I'm not sure if that's what you need (the product names seem to match, but it may be something completely different).
I am sorry, you are wrong. It is called kamień winny
(byproduct of wine making) in Polish. Difficult to get in Poland and if I were you I would have it shipped from abroad.
What are you baking?