Check the isoAcoustics website. They have products for isolation of components, such as the Orea pucks, ISO-PUCK and ISO-PUCK Minis, and the Delos platforms.
The Gaia work for stands as well as floor standing speakers. Whether you use the Gaia I, II, or III depends on the combined weight of the speaker and stand. The website has those guidelines.
I use the Gaia II on my speakers. I also just got a Delos for my turntable and it works great.
For a time I used Orea pucks under my turntable, but now I use the Delos, which is essentially a maple block with the Orea feet imbedded in the bottom. Either way works well, and the most obvious improvement was better, more refined bass and an improvement to the soundstage image.