beebs mentioned this red sauce (Monte Bene Tomato Basil Pasta Sauce).
It's $4.99 a bottle (I think 18 oz.) and has only 1 net carb per 4 oz..
Thanks Mouseissue & Beebs, but Amazon won't ship pasta sauce to Canada. I tried and this is the message I got back:
"Important Message
The following items cannot be shipped to the addresses you selected. (Learn more.) You may either change the shipping addresses or remove the items by clicking Delete.
Monte Bene Tomato Basil Pasta Sauce cannot be shipped to the selected address.
Family-size Victoria Marinara Sauce, 40 Oz. cannot be shipped to the selected address. "
I guess I'll have to keep looking or go on a shopping road trip.