I received a very nice reply from David after Tomas wrote to him (thank you for that Tomas).
Since several folks here seem interested, I will quote here the part of David's e-mail that explains the status:
"I can still sell you the Conception shaders, however, there are some bumps in the road, as I am not in bussines regarding Konkeptoine.
-I can only provide OS X versions of the shaders. Do you need the PC Windows versions of the shaders? I could de-backup them and try to license them for you, but at this moment is quite an issue.
-Payment must be done through a banking wire transfer, as with the closing of Konkeptoine as a seller, there is no Credit card on-line payment and I cannot use checks foreign with my bank.
If this is OK for you, please just tell me what shaders would you like, and I can also pack them in a good (discounted) offer. The stuff I still can sell is Conception 1, 2 and 3 series, the WoodLab, TileCraft and ColorFilter. I will need your EIAS dongle number in any case so the shaders can work with your EIAS license.
It i nice, very nice to see that my stuff is still being used! :-)"
Hope that helps anyone who is interested.
Anthony