I would be worried not only about creating it online, but the inherent security of finger print scanners. I bought one to experiment with security for my laptop. It was cool. But once it was working properly the hacker in me set out to defeat it. Unfortunately it was easy. I lifted my print from a drinking glass with Scotch tape and pencil lead dust (not even superglue vapor). I placed the tape on a different finger and scanned it. It was far too easy.  

A Japanese cryptographer has demonstrated how fingerprint recognition devices can be fooled using a combination of low cunning, cheap kitchen supplies and a digital camera.

First Tsutomu Matsumoto used gelatine (as found in Gummi Bears and other sweets) and a plastic mould to create a fake finger, which he found fooled fingerprint detectors four times out of five.