Healthyheartmarket.com is a good online source for all things low- and no-salt. The one caveat is that shipping is usually expensive, especially for heavy liquid items. So I always look locally first for items I see here before buying online.
Recently though, I saw a special for an item I haven’t seen locally. The Market has an offer for $20 off cases of Francesco Rinaldi No Salt Added Pasta Sauce. That means 12 jars for $39.88

I make my own pasta sauce (and in my Italian-American family, we called it gravy). I use low-salt, imported Italian tomatoes. If you’re not accustomed to making your own, this Rinaldi brand could be a good alternative.
Trader Joe’s also sells its own brand of low-salt marinara sauce, another alternative if you have a TJs nearby. Hunt’s also has a pre-made low-salt sauce, although many main-stream supermarkets do not carry it or only carry small cans of it.
Opt for a whole wheat pasta, add gravy and you have a great crowd-pleasing meal for the holidays.