I have the stock clutch and brake pedals for sale. They came out of 2005 350z, which is exactly the same as a G35 <5k miles. Also have a brake pedal from a 2005 G35 Automatic:

Brake booster: $60
Brake pedal (6mt): $30
Clutch pedal : $30
Brake pedal (auto): $30

Local pickup around pasadena/sgv in so cal. Can ship too!

Thanks!