Soy whipped cream can be found in most major grocery stores and probably all health food stores too. (vibrantwellnessjournal.com)
I do know that at most major grocery stores you can get «wheat free oats». (strawberriesforsupper.com)
However, there are also a few recipes that would require only a few things carried by most any major grocery store, like coconut flour and sweet potatoes. (thecuriouscoconut.com)