How about something like the [AD654][1]?  The freq range is 0-500kHz.  If it's not linear enough for you in the low range, and you can't get the performance you need by attenuating the input voltage, I suppose you can just put a divide by 10 on the output. 


  [1]: http://www.analog.com/static/imported-files/data_sheets/AD654.pdf