IIRC Ford only sell them as part of the TB and they cost a small fortune. In the UK no one appears to sell them for the V6, but all is not lost.

Read the part number off the top of yours then go to www.rockauto.com and search under Contour SVT (it's the same engine) Type in Throttle Position Sensor, and it gives you a list of parts. Match up your part number and order!

I got one from them when I had a 200 and it took less than a week to arrive, and ended up costing around £25 inc delivery.