2003 Chevy Silverado Factory Header Pipe

I have a 2003 Chevy Silverado 4x4 with a 5.3L motor. I need the factory header pipe and catalytic converter. This header pipe is "Y" shaped and is equipped with threaded holes for the pre and post O2 sensors.
If there is anyone out there who has recently upgraded their current exhaust system and wants to get rid of the factory exhaust header pipe sitting in the garage, please contact me. [email protected]