See, the thing is, my Father ran a solicitors practice in the 70's and 80's, and during that time employed a retired ex publican. He happened to become a publican after leaving the RAF where he had been Squadron Leader Rank, albeit in the stores.
He told my dad some time in the 70's that they crated up a load of spits after the war, and concerned that which ever Indian/Pakistani Govts post partition would move to capture these machines and initiate an Air Force with some decicive capacity over the other, the Govt dictated that they be disposed of.
So in best Air Force practice, they were lovingly disassembled, crated up, including being coated in grease ect as if for long term storage, and then sailed 60 miles of the coast and thrown over the side.
Personally, I don't believe there are many, if any spits. Politically there was no appetite to allow them to fall into "enemy" hands, and yet were obsolete and not worth shipping back to the UK. A few were sold to the Israeli air force, but by 1946, remmeber we were in the jet age. A bunch of old ex WWII tired obsolete marque spits in the far east were worth nothing.
Still, it's only conjecture, but told to my father by the person who organised the sinking of them. Sadly he died 20 years ago.