3.31 ring and pinion gear for 8.8 for sale

[03dsgdreams]

There is around 20,000 miles on it and its a factory O.E Ford part. The gear came out of my old 99 cobra back in 2010 when i put a 4.10 in it. The cobra was a low mile mint car. I'm pretty sure the gear should be the same for all 8.8 ford rear ends but please correct me if I'm wrong. I'm asking $50. Thanks