Eric Schuijt runs a bike shop in Amsterdam called DeVakantiefietser, which i think means Holiday Cyclist. The website is in Dutch but Google can translate to English if required, although the original meaning is sometimes a little mangled.
The guy specializes in touring bikes and stocks both Koga and Santos along with various others. Not only does he sell them but he tours them as well. The video below shows him and a friend cycling/pushing their bikes through Patagonia.
This is a man I can do business with. A trip to Amsterdam is looking more and more likely then. I just hope his English is better than my Dutch (won't be hard!).