I heard, there are people, which know other people, who can do this:
http://en.wikipedia.org/wiki/Pad_printing
It's really professional, there is no difference to see. But Geobra don't like it really, to see people doing this. At least, when they print the same prints geobra use. 
In France, some guys, print any design you want expect prints by geobra.
Interesting piece of info!! Thanks!!