... 1954 Rosier Rogure 4CV Barquette? Made in accosiation with Plasticar in USA?
Plasticar is what I was after! From what I can deduce, the Rogue was designed by Motto in Italy for M Rosier but was too expensive to make, so the US company Plasticar made a glassfibre version of the body with no doors, which was presented at the 1954 New York Motor Show