I dunno how you guys can drink those types of beers, to me they taste like motor oil. I'd choose a nice lager any day.
Most porters are technically lagers :) I'm guessing you like pale lagers, usually too bland for me. Motor oil/chocolate milk, mater of perception I guess.
Anywho, Polish Porter roundup:
Black Boss is great
Kozlak is alright
Okocim is good, and available all over the place
Ciechan is awful