Closed.
There have been MULTIPLE threads discussing Nengun and their level of customer service and lead times for delivery.
It is well known that they DO NOT STOCK ANY ITEMS. When you submit an order on the web, they order it in. They are at the mercy of the tuning houses as to when the parts arrive and subsequently leave Japan destined for your front door.
I have put in multiple orders in the past 3 months (20+ different parts), and the parts ALWAYS.......... ALWAYS arrive. Some parts are quick to ship, some are very, very slow.
Once more for the impaired: It is out of Nengun's hands, as they don't keep stock (hence the lower prices). When they get it, you'll get it a few days later. Just be patient, or order from someone who keeps the parts in stock.