Yes, I've compiled the modules by hand.
This procedure works fair enough (The modules cannot be unloaded due to the naming scheme - but Auto-Protect can still be disabled using the command-line... I can live with that workaround.)
My main issue is that I have no guarantee this procedure will continue to work, as the Ubuntu Hardware Stack will push in updates for the kernel (And using newer versions of the kernel)
A 2nd isue, is that I have to install development packages to compile the modules, which I honestly do not like during on all the servers I would like to have protected.
All in all, I'm unsure if Symantec is mature enough on the Ubuntu platform, to be used in a production enviromnent!