http://www.tomsguide.com/answers/id-3003763/headset-microphone-headphones-audio-time-issue.html
Based on above website, you can use separate microphone and headsets at same time.
If true, you could use something like this:
https://www.amazon.com/gp/product/B00N0EPZU8/ref=ask_ql_qh_dp_hza
or...