In this .zip you will find all the accurate helmets for every driver in the game, sorted by brand and ready to customize.
The new models include all the driver-specific accessories like (painted) wings and visor-guards, are 100% accurate to the in-game models. What you see in Photoshop is what you see in-game!
You can also use these templates to customize your own helmet if/when you have changed incardriver_scene.xml to change your career-drivers helmet style. Don't forget you can drop a wireframe onto the texture as a guide!
I hope this is of help to y'all. Enjoy!
For more information on how to customize your helmet, check out KrisDix's video: