I agree. My first choice was Deacons on the Isle of Wight (where we had our trees from) and they say that they have finished the bare rooted season already, because of springlike weather.
But other reputable suppliers Pomona for example, still have bare rooted trees. A google search will find more. Maybe order now and ask for an early present?
Trees in pots are available year round. But you don't know for how long the tree roots were squeezed into a small pot. These trees can take longer to take and establish. Having said that we bought a pear tree at the local garden centre (impulse buy) that even had a fruit hanging off it already, and that settled well too, even though it must have been in the pot for ages.