If you can select the quantity and add the product to your basket, the stock is available or will be available very soon. It is possible that the product is waiting to be restocked (in most cases it will be available within 5 days maximum).
NB: Once added to your cart, if the product status shows as ON ARRIVAL or as OUT OF STOCK , the last available quantities are in your basket and are therefore reserved for you.
You can finalise your order.