Brands will change across regions and nations. They couldn't possibly include a particular brand, partly for the reason you mentioned, but also because most of their users won't have it.
The figures given are intended to be a guideline, not absolute.
Eg what were the values on the flour tortillas you found? Did they vary much? You can either look for the closest to 153, or else if you had something like 100, 110, and 340, just go with either of the first two, and check it off.
It won't matter whether you have the exact same item listed in the tracker as the meal plan suggested, only that you had "a flour tortilla". The numbers will average out over time (some items will be lower than the one on the plan, some higher - over time it'll all work itself out).
Remember you don't have to be *exact*. You're working with averages and estimations anyway.
Deb, in New Zealand