I thought about getting them chocolates and/or other food related stuff from the US. Maybe an assortment of cheeses and meats.
Hmm, I would be careful with cheeses. If they contain some exotic kinds, e.g., this orange American cheese (we called it Reagan`s revenge in 1980s) or blue cheese, the recipients of such a present might have a little dilemma what to do with it. :):):)
And meat is definitely a bad choice. Poland has wonderful meat products.
Chocolates are the safest food possible.
Are there other specific item(s) (doesn't have to be a food item) that Poles like from the US?
Sorry, nothing comes to my mind. The only American product I use is Tabasco sauce. :):):)