Thanks Gerd.
I believe that it has already been established that the next step is Hint 29 - Rust 5, with only the identity of Rust 5 to be determined, and Hint 29 indicates the vehicle was manufactured in Paris. I take this to mean that the manufacturer is actually located in Paris, and not in one of its surrounding suburbs, so the only truck manufacturer that I can find that fits this requirement, and has manufactured a similar COE vehicle, is Delahaye.
Therefore, I offer: Hint 29 - Rust 5, a truck by Delahaye.