Sound deadening stuff behind pedals

I've got a question for all the guys who are handy with part numbers etc.......

The sound deadening foam stuff thats stuck up against the bulkhead behind the pedals inside the car has all come off / fallen off. Now it's not something i would have thought was an issue other than the fact that since it's fallen off you can here a creaking/clicking kind of noise from that area when driving over bumpy roads.

Now the car is due it's 20k service in the next month or so and i was gonna mention it with a view to getting it done under warranty. I just wondered if it is something that has a part number in case they say it isn't covered and i have to pay for it etc.....

Cheers

Dave.