Bind off k3p1 rib?

Trying to bind off sweater collar…k3p1 rib. I don’t want to do usual bind off; would prefer doing invisible or sewn bindoff. Usual instructions only refer to doing this on k1p1 or k2p2 ribbing and I’m confused as to how to proceed. Anyone done this? Thanks, Barbara

Someone once asked this a while back, and no one could find a satisfactory way of doing it.