you say "fresh spread cheese that is pasteurized" but where I am, that's cream cheese or spreadable cheese, really it's all the same thing - so I think some of the answer to your question is quite regionally specific to where you are, iykwim? so when looking at different options iw ould just look at the nutrition labels and see which one you feel is best - ie/ a good amount of calcium, a whole fat (rather than a reduced fat) version, etc.
1 cup of semi skimmed milk has 122 mg of sodium (skimmed milk has more). 1 cup of milk is equal to roughly 1 to 1.5 ounces of cheese (depends on the cheese) in regards to calcium content. cheeses that are comparable for sodium content are cheddar, mozarella, cottage cheese, swiss, parmasean, and meunster. lower fat versions tend to be higher in sodium - although for LOs you do want the full fat versions anyway.
however my understanding with sodium at this age is that you just are not supposed to add salt to food, because LO is getting the needed amount that occurs in foods - there is sodium in formula and if LO is not drinking any formula then the amount in cheese is not going to be a health danger, iyswim?
i cant find your other post but you said one of the reasons you are looking for dairy finger foods is because she is only taking 3 ounces of formula per day, but is only being offered 1 bottle a day - do you think if you offered 2 bottles 9ie one on waking, one in evening) she would take more?