Stumbled across this thread while researching 'Dancer'. In 1980 she was repainted in Essex Petroleum colours to reflect the Lotus F1 team's sponsor of the time. Only a black and white scan from Jabby Crombac's "Colin Champan - The Man and his Cars" I'm afraid, but thought you might be interested.
The Villeneuve pics look like that's an ex-Walter Wolf machine. Villeneuve didn't drive for him in F1 but did drive his cars in the Can-Am series.