POLK CSI A6 Center Channel, where do I get some replacement cardboard tubing?

Hi. Guess I will post this here.

I've got this center channel, I was watching this handy youtube video to see how to open it up as well as see what its internals are about.


Here's my issue...

Found out some mice got inside and made a mess.

They chewed up the left side cardboard tube... which seems to be just glued onto the box on the inside back of the wood box.

I also want to throw away the original insulation blanket and toss in some better quality fill.

I am open to any suggestions on this!

Of course I still have to fire up this speaker to hear if it still works!