MLT
Regarding your first statement, I'll stand corrected because I didn't really read the 'business aircraft' part properly.
To quote you and your 2nd part - did I say they weren't????
"and correct me if I am wrong but both Rockwell Collins and Lufthansa Technik supply Cabin Entertainment Systems."
I also know there are smaller companies who deal in the IFE market apart from the three I mentioned.
For your info RCI is Rockwell Collins.