I think it far more likely that they are simply going to black market sources that are rampant in places like the Middle East and former Soviet states and getting whatever they need no questions asked. I'm expecting that 60 Minutes will probably gin up some photos and phony documents showing Bin Laden personally buying guns at a local Wal Mart.
He was supported by the Clinton Administration as our government supported the KLA along with the UN forces. It's still going on....even up to today.....