I've found a Polish article about heroic firefighters in WTC, but unfortunately without any mention about some with Polish background.
remiza.com.pl/artykuly/pokaz/2366-Bohaterowie_11_wrzesnia.html
Here is the site with known 343 firefighters who died during the attacks:
fdnylodd.com/9-11-Never-Forget/Memorials/343-Firefighters.html
Some of them have Polish surnames like Krukowski, Kopytko, Tarasiewicz, Sikorsky...