I haven’t had any luck finding a solid method for accessing these yet, personally. I’m not sure if anyone else has, but as of right now, I don’t believe there is a way to access those. I’m going to ask around and see if anyone else has discovered a work around for this.
I’m not sure if this would work correctly as I haven’t tried this, but in theory, I think it might work to blueprint in an over-ride of controls for specific items (could change what keybind uses them in theory). Again just theory though, so I’m not actually sure if it would allow the over-ride.