Hello, the Intake manifold flow valve is only serviced as part of the intake manifold, what you'll need to purchase is an intake manifold, it'll come with the flow valve and actuator motor already installed on the intake.
Most any technician should be able to replace it for you, it takes about an hour to change. One problem you may run into is that you're supposed to recalibrate the electronic throttle system after replacement, unfortunately very few shops outside of the dealer have the equipment to perform the recalibration procedure.
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You can do that, after it's installed you might even find that it runs fine without the recalibration.
My only fear is that after you pay someone, then pay the dealer to perform the recalibration you might be at the same cost as just having the dealer perform the job.