Did echase manage to get his design commercially developed?
Yes. My non-burst fire unit meets EN 61000-6-3 Electromagnetic compatibility (EMC). Generic standards. Emission standard for residential, commercial and light-industrial environments 2007, and BS EN 61000-3-3:2008 and EN 61000-3-11 for flicker.
I suspect the original EMMA device did too although I believe their more recent devices use high frequency pulse width modulation, which reduces the low frequency end but increases the high frequency so you need a screened cable to the immersion.