Park Flyer Combat/Electronic Combat Modules
No such product exists. Something like that may be in development, but there isn't anything out there now. I'd be a little leary of a more aerobatic plane getting its motor turned off in an unrecoverable attitude. Since the Fighterbird can only fly in a fairly stable manner, there's little chance of a "hit" sending the plane dangerously out of control.
The truth of the matter is, the Fighterbird flies more realistically than most pilots fly their sport planes. The throttle is supposed to control altitude, not the elevator. Full scale dogfighters didn't have unlimited vertical either. Energy management and piloting skill won the battles. You can really develop some mad skills learning to compensate for the lack of an elevator.
If you'd like to try combat, why not try it the old-fashioned way, with streamers?