It's not even on sale and at a price that will probably see it sat there for a little while longer. https://www.ernestjones.co.uk/webstore/d/1318314/omega+speedmaster+moonwatch+men's+bracelet+watch/
Some ADs might have stock, but yes, the 9300 CoAxials gave way to the 9900s. Personally, I thought the nerdiness of the updated Moonwatch dial layout, the Ti case and bracelet made this the penultimate update to the moonwatch. Though I know that's subjective. I snagged one of these over the summer, and the sales rep said they were living on borrowed time then.
My OB has had this watch in their case for quite a while. It's actually the first Speedmaster I ever bought, but ultimately I thought it was a bit too thick for a daily wearer, and too expensive to keep as a once in a while wearer.