I used to buy Coleman Naturals Kielbasa, but I can't find it anywhere any more.
Try here as it lists endless outlets for it.
This place however ships and has 'quality' Polish products.
I use to live close to them and was very satisfied with their sausages.
Take time to read their story at the bottom of the page about how they came from Poland and started this thriving business.
(Another successful Polish immigrant in America.)