In July, the FBI says it intercepted nine false IDs bound for Ross William Ulbricht, who they say is "Dread Pirate Roberts," the man behind the site. "Roberts" had been soliciting fake identification documents on Silk Road to use in buying more server space for the site.
It shouldn't have been hard.
A simple Google search for fake passports renders websites like FalsePassports.cc and IdentificationConsulting.com.
Need a "novelty" driver's license? Several sites offer those, and you can get a diploma and Social Security card while you're at it.
"For your own personal use and amusement," notes Global Intelligence ID Cards Solutions.