This is what I received after phoning Amazon and speaking to an escalation manager yesterday.
Sun, 14 Feb at 15:39
I've checked your order #202-3765676-6873901 and can see that the availability status for Bravo Throttle Quadrant - Honeycomb Aeronautical PC is currently listed as "Temporarily out of stock".
When an item is listed as "Temporarily out of stock. Order now and we will deliver when available" this indicates that the item ordered is a little more difficult to source from our suppliers, so we can’t predict how long it’ll take to arrive. After you place your order, we'll do everything we can to get the item for you.
Unfortunately we can't provide a specific date as to when we expect this item to be in stock but rest assured we’re trying our best to obtain more stock to fulfill your order.
As soon as we have more information, we'll e-mail you with an update.
If you find that it takes too long for your order to be fulfilled, you may cancel it at any time before it enters the dispatch process and you won't be charged.
I hope this helps. We look forward to seeing you again soon.
Your feedback is helping us build Earth's Most Customer-Centric Company. Amazon.co.uk <firstname.lastname@example.org>