passive mob that produces string

I like playing in peaceful mode because I'm bad with the hostile mobs (jumpscare when I get attacked), but it's a hassle to get string without spiders. If I want to go fishing or make a bow for hunting, I don't want to have to use commands or look for a mineshaft or abandoned village first. So, I think it'd be a good idea to add a mob that can produce string, like a smaller, passive variant of spiders who's webs you can harvest or some sort of moth who's cocoon you can take after eclosion.