According to an article in The Australian, Richard Janeczko, Customs national manager for investigations, makes precisely that claim.
"It's a misunderstanding that [child pornography] is all on the internet," Janeczko said. "A lot of [pedophiles] carry it. A lot of the publicity that the internet's being policed has meant that (the trend) has been displaced."
Janeczko claimed that one of the reasons Customs was confiscating more child pornography in hard-copy form could be attributed to the success of the police in catching child pornographers operating on the internet.
He also speculated that the increasing array of devices that could carry images, such as mobile phones, meant people did not think Customs could detect illicit material.