E Brake Grommet popped out of Firewall, How do I get i back in?

[BillRod]

Hi All

Not sure if this is where I should post it but here's my issue.

The E-Brake cable grommet popped out of the firewall inside the truck.
It is still around the cable.
Any ideas how to get the grommet back in or what to use to block the hole?

Lots of real hot air coming through into the cab.
Thanks in advance for any help with this.
Bill