I've found this 2 pictures, the first is about
"During the official French visit of Britain’s King George VI and his wife Queen Elizabeth from 19 to 22 July 1938, their daughters, Elizabeth and Margaret, were presented with two dolls, called Marianne and France, by French girls as part of a national fund-raising initiative.
Along with beautiful clothes designed by top Parisian fashion designers, each of the dolls came with her own Traction Avant cabriolet with a personalised number plate".
And the second
"the made-to-measure production of the models – with right-hand drive, naturally – was entrusted to the AEAT coachbuilder firm, which worked from nature.
The coachbuilders are photographed here with their model in the courtyard of the company’s workshop in Neuilly. The car on the left is light green and the one on the right is blue"
So I guess, they could possibly could built it, too