i can't find even one example of such a thing out there. the only use for electric pumps seems to be drag racing, where it's on/off, or crude control. mine's got two P.I.D. software control loops that holds temp tight as you desire.
I believe that many hybrid electric cars use a similar approach as the gasoline engine is turned on and off - so the electric pump is needed to keep coolant flowing. But to your point it may be a crude on/off affair - not the sophisticated temperature set-point approach you've taken. I think that Audi, VW and BMW have used electric recirculating pumps in some models (in addition to the mechanical pump).
The options over at
Davies Craig seem quite numerous.
Thanks for sharing.
