UPDATE: the original boards are all gone, but if there's enough interest, I'll be willing to have another batch made. See my posting below.
UPDATE 2: we've made it for the second batch. Topic closed for now, unless another 10 people jump in

UPDATE 3: we've made it for the third batch. As there still seems to be additional interest, I'll start a fourth batch.
The board is discussed in this topic:
domoticaforum.eu/viewtopic.php?f=70& ... =60#p58086
The board itself is described at:
http://www.tclcode.com/opentherm/index.html#gateway
I wanted one myself and had to order 10 at the same time. These pcbs are blue with ENIG finish (= golden pads for good solderability):


Price: EUR 6,50 each + EUR 1,- shipping within NL.
Contact me by PM or reply to this post if you're interested.
The parts to complete the build can be ordered directly from Conrad:
tclcode.com/opentherm/schematic.html#pa ... l#partlist