Ok, while trying to find the Takstar on Taobao, I bumped up these instead : TrueAudio P2. Looks nice and seem pretty small for planar earcups. Absolutely no idea how they sound though?
Its listed as :
Sensitivity : 90dB/mW
Impedance: 34Ω
List price: RMB 999/-. (Approx Us$149/-).
Nice find! I've been looking for those. They're yet another yoga rebrand, Yotronics cd1200. Unfortunately It's $299 on trueaudio website. Sundara he560, sine or alara don't cost that much more.
Trueaudio T2 looks very interesting for $49