I think you'll be hard pressed to find someone who'll sell you them now, they're slowly earning their weight in gold...

Those motors too, they seem like they might be motors within a case, with a gearbox pre-attached - amps seem rather low too like you said, it's a shame though...
I don't think there's much out there that'll match the S900 and isn't brushless to be honest with you, I think the entire sport will have to move on to brushless eventually (the traditional high power drives are being discontinued in favour of more power dense brushless) so the sooner the better really.
HardWired II's going to run on it, so I'll see how it gets on with that in there!