https://shop.vibrationtherapeutic.com/
He used to sell on Amazon. This is his own site. Lots of straightforward info that is worth a read even if you don’t go with his product. Very ethical. Responsive. Discouraged me from buying because of possibility that it would compromise the structure i was living in. This unit can be programmed like the marodyne but also can accommodate a more intense workout. Good luck. Not sure about present but he used to be available to answer questions directly.