Hi D, our company has some smaller devices which might work in your unusual application, such as Audiopoints and Sistrum platforms.
Barry is correct, solid and rigid stands do not provide "isolation".
Our products are designed to manage vibrations, and not "isolate". Our whole company is built on "not isolating".
Barry and I often differ on this issue, and offer different solutions. We both have many reviews and user testimonials over the years. Just different ways of doing things.
Tom Lyons
Starsound Technologies