Stopping Air Infiltration at Cable / Phone Line Entry

I have an entry point for cable TV coax, phone lines and a couple of grounds. There are about 8 Coax cables and 8 phone lines. They exit the basement of the home through a hole drilled in the poured foundation.

The air infiltration at this opening is significant. There is effectively an open
path to the outside between every cable. They fit pretty tightly together but if you flex the cables a bit you can see sunlight.

I'm struggling with how to stop the airflow. My first thought was expanding foam but that could be a mess and not guarantee that the leaks would be filled.

I searched the web but mainly came up with industrial products for outdoor utility boxees.

Any suggestions?

Thanks for your help,

Johnny