Boardgamegeek https://boardgamegeek.com/boardgameexpansion/1526/pitchcar-extension
English - Carabande Action Set and PitchCar Extension are two remarkably similar products, but each is only compatible with its base-game, and they have differing content.
Ludovox http://ludovox.fr/jeu-de-societe/pitchcar-extension-131/
French - Un jeu de Jean du Poël.