Toyota HQ Customer Service for Prius

Let the dealer handle it! I'll tell you straight up that circumventing the parts department at the dealership is sure way to get your parts later than sooner. Be patient. The parts have probably been special ordered from Japan.

 

Japan suffered a severe earthquake recently.
So obtaining this information...and/or your parts might be a difficult task.
I wouldn't bother escalating you query in light of recent events.
It would be like calling The President of The United States to complain about needing a new stop sign on your corner.
Given the recent disaster in Japan, I'm guessing all parts shipments are on questionable time lines.

I have to agree that as frustrating as it is, your best approach might be some Zen like patience, and my queries might start and end with the dealership.

 

I agree with "working" with your dealer parts department.
If HQ contacts the dealer over this issue...the dealer may not like that.

You may have one option once the dealer finds the part....you pay (or negotiate) for air freight....to reduce your wait time.

FWIW, thinking outside the network, if you have the parts numbers you could contact internet dealers and Ebay to inquire if the sellers have the parts in hand/ on their shelf and again pay for the part and have it air freighted. Yes, again you should keep your dealer parts department informed of this plan so double parts are not received.

Good luck.