It looks like it's available here
http://www.vacuumstate.com/index.dn...&a=%9FZ%B0/_%DA5%5E&b=736273.7316399406&sku=7
A couple of related threads on this forum
https://www.diyaudio.com/community/threads/allen-wrights-tube-preamp-cookbook.390979/
https://www.diyaudio.com/community/threads/pure-silver-foil-for-hi-end-cables.372710/
http://www.vacuumstate.com/index.dn...&a=%9FZ%B0/_%DA5%5E&b=736273.7316399406&sku=7
A couple of related threads on this forum
https://www.diyaudio.com/community/threads/allen-wrights-tube-preamp-cookbook.390979/
https://www.diyaudio.com/community/threads/pure-silver-foil-for-hi-end-cables.372710/