The last days I spent at the Fakuma Fair in Friedrichshafen and have some good news for our cooling solution. I found a company producing thermally conductive plastic compounds. So it is possible to injection mold heat sinks in any design! >> Ensinger Compounds
"thermally conducting plastics have been proven to offer cooling performance comparable to that of metals"

We can use this for both, the sensor cooling and the Microzed Board!
The guys at Ensinger are so kind to send me samples of their compounds so we can build our own heat sinks for testing.
I'm very happy and I hope this is the solution of our cooling challenges!