I've considered growing actinidia kolomikta , a species of kiwi berry vine, which is noted on wikipedia as being highly attractive to cats. The article mentions Actinidia polygama so I wonder if it's just the entire genus
I know silvervine is in a lot of catnip mixed, I think not all cats react to whatever pheromone is in catnip so a lot of mixes have several different euphoria in them to try to increase efficacy.