Simply purchase a set of Uniden uh065sx-2 radios from a Uniden dealer and this bike to bike wire, add them both to your current N-COM setup and your good to go.
This bike to bike wire has a push to talk button which can be mounted on your handlebar to activate yoru radio.
The Uniden radios are compact and can be carried in your jacket pocket or can be mounted to your handle bars using a universal handlebar mount.
Please note that one set of radios and two of these bike to bike wires will need to be purchased and added to yoru current N-COM system for full bike to bike communication.