RUSS TUBES 6N6P-I = ECC89 = E182CC Lot of 10. NEW! RARE - eBay (item 260208610618 end time Feb-08-08 14:38:02 PST)
...and put me down for a pair if you think about selling them. My current ones have remnants of burnt sennheiser pads on them
I ended up getting some of these, which appear to be identical to the ones shipped with my amp.
ECC99 / E182CC / RUSSIAN 6N6P / 8 NEW NOS !!! - eBay (item 360020134548 end time Feb-10-08 00:56:56 PST)