Yes you are correct. It's a different John, but I'd spoken to him previously about the Ecotherm system and that's what confused me.
I quote from another web site . . .
". . . Ecotherms are hard to get out of John Bennett these days, a mate here in perth bought the CNC design from him and now manufactures them locally in perth. Around $300 for the kit: bottom hose housing, top hose flow director, hose clamps, hoses etc. John from Choice Radiators in Perth also made his own copy, although having seen one I spotted a few design ommissions that I know John Bennett would shake his head at."