Cameraquest is a US Voigtländer reseller. They made a nice site about the Voigtlander MICRO 4/3 System Adapter. You can find many pictures and precious informations. Well done camerquest!
And if you want to know more about the german Novoflex Adapters check their homepage.
Novoflex has a long list of adapters:
Links to shops with MicroFourThirds adapters:
Amazon US
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Thanks Fabio for sending the links!