[GreenKeys] sound deadening

[kh-phillips at 9-5usa.org]

Is there a current source for the sound deadening material used in, for
example, a 28ASR . . . or some good substitute?  I recently acquired some
28s (RO, KSR, ASR) which seem to have been serving as rodent resorts for
quite some time so if the sound deadening material had not already
deteriorated it had been providing generations of rodents with warm beds.

Thanks,
Kevin