Hey Larryr, I use two 14" blocks of heavy ceramic tile to sandwich some Vibrapods. The lower shelf is bolted to the too shallow wooden shelf of a floor to ceiling bookshelf I am forced to use.
Also, check the Mapleshade website. The have a foam and it is probably the kind of thing you are looking for. Good luck, Charlie
Also, check the Mapleshade website. The have a foam and it is probably the kind of thing you are looking for. Good luck, Charlie