I ordered a D600 L bracket from the Nikonian shop.
A week or two later I went directly to the Kirk website and ordered a plate for my rf camera. I got an acknowledgment. I responded with a question as to when I might expect my D600 bracket.
I was told that they satisfy the back orders which are bought directly from their site first and only then do they start sending out the orders which were made through the Nikonian.
This means that it is disadvantageous to order through this shop which is a great shame. I do think that it is very unfair of Kirk because once we pay our money I think that we should all expect the same level of customer service - but apparently not.