I have a pair of 4 inch' thick maple boards made by Timbernation. They excellent . I then asked for a custom isolation stand for my pre amp. He disappeared for several months, so I can guardedly recommend him. PS I got my deposit money back.
I also have immense brass footers by Edensound. He is reasonable and reliable. I think he has a presence on Yahoo. I put them on my pre which is tubed and occasionally microphic while playing , no tapping. It uses 6SN7s some of the oldest and most precious can be noisy. The footers damped the pre well but tripled its weight . His prices were more than fair. He even drilled the correct size screws for receptacles on my pre.