http://www.3dmicpro.com/
Need to be careful... check for mono compatibility and phasing issues.
You'll find that most things designed to be listened to on headphones usually don't sound as good on speakers.
I've been down this path with the dummy head mics, holophonic mics and various box's that claim to optimise the response for listening on headphones.
I've got a Sennheiser Dummy Head Binaural Mic system that is sensational when you listen back on a pair open ear Sennheiser headphones like the old HD414's and 424's... it's like being there... but take that same recording and listen to it thru the control room monitors and it's not the same... loses all it's width, punch and any centre image loses its definition.
Another problem is if it's using any kind phase augmentation then you need to check it on a dolby surround decoder as you might find things moving into the rear speakers. This becomes a problem on tv's with a pseudo surround function for the built in stereo speakers. Everything is fine when you're sitting dead centre to the tv, but lean to the left or right and you'll start to hear information coming from out really wide... like the other side of the room!
Interesting story:
Decades ago I installed one of the first surround systems to go into a production control room and the studio owner was very impressed until we pulled out some library music that was recorded with a drum machine. The stereo toms had been put thru some fx device which messed with the phase of the signal and the dolby decoder decided it was surround information and so directed it to the rear speakers. Any time the toms were hit they came out the rear speakers... very bizarre.
There were a few cheap fx units back in 80's that achieved a stereo output from a mono effect by splitting the signal and running one side thru an inverting opamp. This put one side out of phase creating a nice wide stereo spread, which was fine for live performance but in the studio if you happened to hit the mono button the effect disappeared. I'm sure Rick could chime in with a stories of his own concerning this.
So back to the point... check mono compatibility and run it thru a plugin that will display phase before you decide to use it for any serious recording.
Hope this helps