Thrustmaster Т300 RS wheel elongated buttons
Because of using an adapter and steering wheel from of a real car, you will not reach the Thrustmaster's standard buttons.
So these elongated buttons and D-pad have been designed specifically for using in this case.
The steering wheel adapter I used (by Valdas Dziaugys) - https://www.thingiverse.com/thing:4663190
Free for using. Not for selling.