what you want is here, scroll down untill you get to
WR-G305e WiNRADiO Ext USB Standard Scanning Receiver 9kHz - 1.8GHz there are quite a few different options as well.
but I don't think you would like the price though
http://www.wsplc.com/acatalog/Comput...led.html#a3860
FL as I understand it it's the "owners" of the frequency that have to instigate the proceedings against the person listening, and along time ago the then "owners" of civil ATC frequencies said they would never do so, that doesn't mean of course that they couldn't change their mind. It is really one of those unenforceable laws providing the person just sits quietly and listens and lets no-one else hear what he's doing.