i did a LOOOOOOOOONG time ago back in RSC.. see if i can find my thread on it
made it out of my logitech Formula GP wheel (since im only using the pedal) so i attached a stick to it and made it a handbrake....
but it became utterly useless because it was to hard to have that many things to control (with my shifter too) and also i didnt realy have any 'good' place to put it