I have a Boreas Ignis Frame and forks and it looks as though Boreas were taken over by Principia. Mine is aluminium and it works. Lightweight Frame and forks and these Frames are not made- they are Engineered.
Link to the Boreas site is
http://www.boreas-bikes.dk/pages/ignis.html
Now this is a lightweight Aluminiun Frame and Aluminium is heavier that CF- is stiffer than CF- and will give a harsh ride. Not this one- I have a Giant TCR-C frame and the Boreas rides better- is lighter and I would say the CF frame is skittish in comparison to the Boreas.
If it fits and is cheap enough- Get it.