Stonehenge and its Environs 134
Image by Chance

So they found a Bluestone in a long barrow within 30-40 miles of Stonehenge, when it is thought that a large quantity of them were transported to the Stonehenge site in the Bronze Age.

I call that increased Bluestone popularity.

Have any "wild" Bluestones been found in the South West of England? Without those the glacial theory is dead.

Well, Aubrey Burl cited them as having been found on Flat Holme and Steepholme in support of his own belief in glaciers but that (and much else he said) was challenged in letters to British Archaeology -
http://66.249.93.104/search?q=cache:XiXuXa7kNOgJ:www.britarch.ac.uk/ba/ba47/ba47lets.html+%22Boles+Barrow%22+bluestone&hl=en&ct=clnk&cd=2&ie=UTF-8

Maybe the blustones in barrows were the occupants rather than the material of the barrow. Several archaeologists (I had to correct that having first typed archaeoloGITS) believe that the bluestones at Stonehenge represent ancestors (or their spirts), so maybe one or two of the most important ones were given a barrow burial.