bobad: ""Mr Sellstrom confirmed that the quality of the sarin was superior both to that used in the Tokyo subway but also to that used by Iraq during the Iraq-Iran war," he told reporters."

Well, there are TWO more possibilities...'Iraq-Iran'. I already posted about the high ranking officer with the Iraqis, who said he oversaw the transfer...and then there is Iran....and of course, others, as well.
I don't think it is a foregone conclusion, as of yet..not matter what the speculation is, or who is doing the 'speculations'...bottom line, somebody is playing it close to the chest....and that could be ANYBODY!!!

GfS