The trucker must wait until they can fill the trailer before they actually move to the dealership. We waited about 3 weeks before the dealer received a delivery date.
May be you can try to look for a replacement from a automative recycling yard. You'll be amaze to find out what kind of things you may find. My guess is that the DVD system is also on other Lexus models as well.
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I HAVE SEEN REPLACEMENTS ON EBAY!