"When I share this research with vegans and vegetarians, their response is: crickets."
I'm suprised the vegetarians you're talking to would suggest crickets, even though that's one of the leading animal protein replacements in the form of insects.
Do vegetarians/vegans have similar ethical objections about eating crickets for food? I suspect so, but I don't know if crickets have the same type of cognition/emotions as vertebrate animals.