multi layer material like that will not be cheap for any application - lead/foam or lead/felt similar to 2nd skin is commonly used for high end yacht flooring underlay, might try to find some used

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot