Here on YouTube in a single video.

This is how a daxophone looks. It uses contact microphones that pick up the vibration of the wood. The tongue being bowed is replaceable, and different shapes and wood used for the tongues result in different timbres. The implement being pressed on the tongue is called a dax: one side of it is fretted, while the other allows free variation of the pitch.

Reichel documented the construction of the daxophone, including some tongue shapes that he found working well. It seems that his website, linked from the Wikipedia article on the daxophone, isn’t working now — but afaik a couple people are making daxophones and offer them for sale.

Unfortunately, it’s said that controlling the pitch with this instrument is rather difficult, and Reichel himself adjusted it after recording.

‘Yuxo’ is the only album consisting almost entirely of the daxophone, but it was previously used extensively on ‘Lower Lurum’ and ‘Shanghaied on Tor Road’ (only part of the latter album is available on Bandcamp and not at all on YouTube; idk about other platforms).