I just got back from the local Ford dealer. The broken linkage is part #9S523, and is only available with a complete throttle body. The throttle body is running me $198.00 (including tax).

It looks like a fairly simple process to change out the throttle body on the 2.5L, so I'll at least save on labor costs. It's certainly frustrating to have to go through the time and expense over a $0.50 piece of plastic!