yes its available but its not anywhere near the quality of the iwc 3789 check this review out
http://forum.replica-watch.info/vb/showthread.php/udated-iwc-top-gun-v1-50673
Sorry but that review is for the normal top gun(3789) and he is talking about the doppel chronograph (3786 or 3799). they are all top guns but we are talking about different versions here.
The top gun is 44mm, the doppelchronograph 3786 is 44mm and the 3799 is 46mm.
As far as i know there is not a good 3799 version out there. I think there is only one at 46mm and its powered by a faux chronograph (movement ASIAN MJ 2813). The dial has wrong numbers... and it has only one chrono hands instead of 2 in the gen.
Forget about the doppel chronograph option, my believe is that it wont be available ever.. there is just not enough demand for it.. and never seen a chinese movement with this option....but a better version powered with an a7750 would be nice...
Since this movement is really small compared to an 7750, you will need a movement ring to hold the a7750 in place in the big 46mm case.
Actually i got a case for this version but never went any further. The case itself looks quite nice, although its a PVD.
I was thinking of having an Eta 7750 installed on it and get maybe gen dial and hands, but the biggest problem will be the design of the custom movement gasket.
So for now we are stuck with this.. my question would be if we can use a movement gasket from another 46mm watch to fit this one... anyone?