There's a mostly dark blue carskin and cockpit, identified as a #24 and #25 1977 Hesketh with Rizla and Penthouse adverts and a design resembling that in your photos, here: [www.grandprixgames.org] , in the "Backmarkers 1" download.
Yes! I love this paint. When I see all this borring skin of nowadays! I searched for the picture painted on the car and just found something could help. Hope I'll make it soon...