Tonka Army Truck GR 2-2431 Bench Seats

My friend collects Tonka Toy Trucks. He mentioned that a lot of the 1960's vintage Tonka Army GR 2-2431 trucks are missing their bench seats in the back. I designed and 3D printed seats. The color isn't perfect, but the closest filament I could find (If someone knows of a 1.75mm filament source that is a better match please let me know!). These should also fit the 1965 Airforce Troop Hauler. We would need to find a filament that matches. I don't have access to one to color compare.