Company name is Z-Cars. They did some of the work on my chassis, have been doing BEC stuff for a long while now with background in grasstrack racing.
Website here: https://www.zcars.org.uk/ but no info on the Smarts yet.
I have some pics of the demo car and conversion kit Chris had at the Autosport show recently if anyone is interested..
The kit also fits the new Smart roadsters. Having test driven the roadster and also driven GF’s normal Smart, I reckon it’d be best put in the roadster which at least goes round corners to start with!