None of these have been uploaded, for a number of reasons. With the Mks.I and II, it's simple - the model is payware. It's the JF/AH Spitfire, which is one of the Zuyax/3 Aces family with the Mks.V, IX and XIV. I've used the new cockpit from the Mk.IX, which you will already have if you've downloaded the later versions we uploaded recently. I've got about 25 aircraft or so based on the JF/AH model, which of course has been tweaked. Some skins will not work on an untweaked model, as early Spitfires had the undersides painted either fully or partically in Aluminium.
You can see the result on this development version, but it won't work on the ordinary model as it stands. And no, I don't think it's all right to upload the model anyway...