A big thanks to all involved for providing updated oscams!
Edit: all AFN channels on 9°E work now. The configs posted by @medousa (post #454) did the trick! (my previous config had an issue with AFN Prime Atlantic - only audio, no video)
I'm using oscam-svn11438-mipsoe20-webif-oscam-emu-patched.tar.gz from here: New OSCam svn11.438 Emu -r777 on my VU+ Duo.