Not sure if they have what you are looking for but a great Polish place in Stoughton is the Podhale Deli. They have homemade Polish foods and groceries. The woman who runs it is very nice.

http://www.merchantcircle.com/busines...

It is in a random building and was a bit hard to find at first. I've also been to the Polish restaurant in Dorchester mentioned above. That place is good too.

Best place in Nonantum is Vecchia Roma. Run by a nice couple. Great food. I'd say prices weren't too killer. Been a while since I have been there though:

http://www.vecchia-roma.com/