@geoffkait - the idea of a combination to produce ideal results makes sense and is intriguing. Do you have personal experience with a product you’d recommend?
There is much to choose from for audiophiles these days in terms of isolation products. It all comes down to budget, the weight of the item to be isolated, and location of the item to be isolated, e.g., on the floor or on a rack. You could search for “audio vibration isolation devices” to get an idea of what’s out there.