But while you can talk about reproducibility etc, at the end of the day the amount of variation between various brands of canned pumpkins are less that the amount of variation _you_ should consider when making a recipe to match the tastes of those you are making it for.
We have plenty of foods we make at home where we routinely just look at the base recipe and decide "that is too much/little salt/sugar/etc" and we are happy in the end. Harder for baking tho.
Digestives [3] are the typical substitution in my experience, but again nobody knows how close they're getting. They look thicker, to me ...
[1]: https://en.wikipedia.org/wiki/S%27more
Still has the issue of what is this branded product really though.
A biscuit base in the UK would usually require a pack of digestives and a rolling pin. I suppose some supermarket sells crumbled biscuits but...
As an aside, Golden Grahams used to be popular in the UK and I don't think anyone stopped to ask what the name meant.
A beverage example is the Piña Colada. The original recipe calls for Coco Lopez (see the Regan, The Joy of Mixology), and while you could substitute for some other coconut cream (confusingly, not cream of coconut), it's got the expected amount of sugar and thickeners in that make the classic drink. It's a specialty food in Europe and I assumed it was an antiquity, but no, our local supermarket sells it.