GetValidPositionsForBox Equivalent

I am interested in working on a game idea that is squad-based, and have whipped up a quick and dirty method of retrieving nearby valid points on a navmesh in UE3 using FindValidPositionsForBox(). I was hoping to continue the project properly in UE4, having used UE3 for many years, but I can’t seem to find the equivalent functionality. Is there a way to retrieve valid points on a navmesh in a radius, preferably with the appropriate extent spacing? It’s pretty crucial to how I’ve planned everything out.