Blueshound24
Headphoneus Supremus
No problem. I have purchased a bunch of different tunes from these folks (6SN7/CV181s/300Bs/274Bs). Found them quite good.
http://stores.ebay.com/hsaliencehifiaudio/
Thanks! I think I'll email Icon Audio and see where they source their David Shaw CV181's that ship with the HP8. A few posts above, Balanceator said they are Psvanes.