Two problems: First, I believe she is under exclusive contract to S1 in Japan. Secondly, the amount of money she is making (because she is able to do mainstream work as well...the Japanese don't really have the 'porno glass ceiling' thing going on) would probably put her well out of Vivid's price range, let alone your average (or even not so average) gonzo company.

Who knows, maybe when her contract expires, but I wouldn't put money on it.