Dexcom seven+ transmitter (where)

Hi, I´m using Dexcom Seven Plus and I won´t change to G4 (I have a lot sensors), but problem is I cannot get a transmitter in europe, but maybe in USA... or some have a used transmitter from last batch, I would like get (and compensate of course), to I can continue use it, I hope, all this year.

do you know if dexcom USA continues to sell it?