On CNBC they had the CEO of First Majestic silver, a Silver mining company listed in the US, saying they sell 5% of their mined silver to people from there web site: http://www.firstmajestic.com/s/Home.asp (top right corner) He also said, he sets the price they sell at personally.
Nobody can afford to take delivery to create a short squeeze on the comex, they can't even afford to put up the extra few % margin as the recent fall proves, let alone full 100% Silver will be a increase steady and shore or the same. IMO