It's "coming soon" say RSOV. Also i see that they are listing more parts including a motor which is handy as these are the main things that go wrong on the PTW.
You can now get replacement IC panel and ECU Mosfet (and complete gear box) from asia airsoft. I bought a M4A1 DTW from RSOV and will let you guys know if its any good when it arrives. I see that there is a CQB model on the way... nice.