Yes, this is a Duport 125/4, but the first 'generation', the GL. It was built between 1987 and 1989, then replaced by the more 'rounded' GT. Both were powered by a ferocious Ruggerini twin 654 cc diesel.
The GT was produced until 1994, the last two years by the last incarnation of Duport, SND (Société Nouvelle Duport).
And, in fact, there is a connection between Duport and Suncar. The Arpège prototype was built by Jean-Claude Arié and Guy Duport. Then Arié kept this project for himself, and sold a few under the name Suncar. Lately, the Arpège business was taken over by libanese investors under the name Kamouh International...