There are different Business Directories :

Try all different Business Directories offered by
Every Engine has different results,
Most companies are listed in serveral directories
but the results are not the same ...

Products / Produkte
find products
and order them directly (example Fashion, Vodka, Books)

Products via Amazon

Business to Consumers - Companies providing Products or Sevices for End Users
(example Boutique for clothes)

B2C Directory Panorama Firm
B2C Directory Yelp

Business to Business - Companies providing Products for Professionals
(example Manufacturer of Store furniture)

search through the government
Poland Gov Search
this search engine goes through
all the Polish ministeries,
maybe the company you are looking for
has been mentioned at some point.

search in another country
Phone Book of the
maybe the product / company you are looking for
can be cound through the directory of another country

good luck ...