It is in my book. It has a really nice story, involving Janos Kesjar (father of Csaba Kesjar, a talented Hungarian racer who died young in a racing accident) and the Villamosipari Kutatointezet (Research Institute for the Electric Industry) aka VKI
Some guys at VKI looked at electric vehicles - over the years they converted an Ikarus bus to hybrid powertrain, made a couple of electric Barkas conversions and also a few one-off prototype city cars with plastic bodies.
Now Kesjar got hold of one such bodyshell and mated it to an lengthened Trabant chassis. Eventually at least three were built in around 1969-1971.
This is what was able to put together. But there is another angle here. There was a very good Hungarian industrial designer, Jozsef Cserny. He designed boats, trailers, buses etc. Unfortunately he died a few years ago and his widow is not very cooperating. But it seems it was Cserny who designed the bodies for the VKI prototypes and it was also him who created these bodies. But this needs to be proved.