Hi Ben,
The EM2 is no longer in production and the EM3 replacement is not going into production for another 6 weeks or so. I doubt it would be worth their time to develop the needed interface hardware and software but I would be glad to send them the latest protocol for the EM2.
You might mention to them that the EM2 is interfaced with a CMOS level serial interface and only sends out raw sensor data that requires further processing and calibration to arrive at the actual value of the measurements. It's not a simple job.
Tracy