Before I pull the trigger, is there a better (more accurate) source for the parking brake release knob or the rubber pad? Or any reason not to buy these RESTOPARTS from OPGI? PP78927 Handle, 68-72 A-Body/Riviera Parking Brake Release Standard In Stock $14.99 PZ00015 Pad, Pedal, 1964-72 GM "A" Body, 1976-77 Bonneville/Catalina, Parking Brake Standard In Stock $9.99