You are welcome!
The Sigma:
"In the second half, of the 1980's, the wind of change was appreciable, the political atmosphere was ease. There was a question: "What will be after Polski Fiat and Trabant?" The Tiszántúli Autójavító Vállalat in Túrkeve, lead by the industrial designer, József Csathó, has developed during 1989, and interesting small car, based on the Polski Fiat 126p. The three-seater car, named "Sigma" has foregone the McLaren F1, because the drivers seat was in the middle front of the car, and the passengers seats was sidewards behind them. The car was exhibited in the BNV (Budapesti Nemzetközi Vásár, International Fair Budapest), but the visitors named a foolish price for it. So the project was shattered."
Sorry for the laxity translation - my english is not perfect.
Anyway, the car looks very similar to the Fiat Citycar from 1972:
http://nolinks.html