Where can I get a transmission for best value, should it be new or rebuilt? on 2009 Volkswagen Routan

For a VW Routan 2009 3.8L,V6

Asked by for the 2009 Volkswagen Routan
Wow high mileage? What happen to original transmission? I would highly recommend a replacement that would include parts & labor warranty of 2yr/24,000 at a minimum. Good luck.