Best Way to Trigger Animatable Morph on Specific Body Part?

[Twelvepak]

This used to be easy, by selecting a trigger, then setting Person/Geometry/(body part). I can't use this method anymore because in the third selection tier, it is limited to 400 entries to select from, which fills up with clothing items that I'm not using in the scene. That has to be a mistake or oversight or something. Is there an alternative method to select a body node via a trigger to tell that body part to do something upon the trigger? For example, telling a hand to clench or unclench when a certain trigger is touched?