The premium leather cases for Microsoft's upcoming Lumia 950 and Lumia 950 XL smartphones made by Mozo are now available for pre-order via another outlet. Clove in the US are selling the cases for the price of £44.99, including VAT.
At the moment, it looks like Clove is only selling the Black, Red and Brown leather versions of the Mozo cases; the white models do not appear in the pre-order listings. They also don't show a ship date for the cases, with the listings stating they are awaiting their first shipment. Mozo has been taking pre-orders for the cases on its own store for the past week.
Thank to Joe for the tip!