The latest audio panels do have spatial separation built in, i.e, Garmins GMA350 and up, as well as PS Engineering from certain 8000series up.
(When I replaced my audio panel a while ago, I had a look at it and decided against. It did not feel right in a GA aircraft with its little work load and I found the fixed distribution distracting - the system does not know your heads actual turn .. may be different feeling in combat fighter.)