Guys,
Unfortunately, there is no local source for the JJ KT77 (as far as I know), I got mine at Martin Electronics (Burlington Square Singapore) for SGD35 each last Nov.
If you happen to be near Sucat Pque, you can hear them mounted on my AMX monos. There is a thread at WS comparing these with the Mullard (new production), and I can concur, it beats the Mullards by a long shot.