Automotive (tractor, really) cushioning/dampening foam???
"Pete C." wrote
Three possibilities:
1. Industrial plastics suppliers typically carry foams in a variety of
densities.
2. Companies that do custom shipping cases typically carry foams in a
variety of densities.
3. Sewing / crafts stores typically carry upholstery foam in a more
limited variety of densities.
3A. Upholstery shop.
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