bcowen
Headphoneus Supremus
someone already posted it but this has been in my bookmarks for a while, once you start buying tubes you don't stop...
https://tubeworldexpress.com/collections/power-tubes/7236
$200 AUD a pair, a hi-fi store in Australia is selling matched pairs for $240 AUD with free shipping, so I might check them out if you all buy the stock from tubeworldexpress
I almost feel bad I bought a bunch of the Cetrons for $25 each on Ebay a couple months ago. Almost.