Kabanos sausages - San Francisco, where to buy?

My sister has moved to the Berkeley area of San Francisco. She has a yearning for kabanos sausages (Polish) and though we tried Star Groceries, Berkeley Bowl, Safeway and Trader Joes, we could not find anything. I cannot believe that in a huge place like San Francisco we cannot buy such things. Can anybody help please? I am back in the UK now, but I am sure it would please her soooo much. Thank you in advance