I bought mine from TAG Heuer direct in Aug'16 and it came with the signed blue box. These blue boxes are very much part of the calibre 11 watch and if they still come from TAG with them today, I'd personally make sure that I'd buy the watch with it. I actually received two of these boxes from TAG (long story) and remember the discussion with them, informing me they were pretty expensive and very beautiful.
If it was me, for a watch of this value and I was buying new today, I'd make sure it came with the blue box with the correct book and manual, rather than trying to save money.