There is a new breed of Bass makers out there today. Although I have only played Basses by a few of the new Makers in USA, I have heard great things from many others even from competitor builders that happen to respect their colleagues.
The two Bass makers I am familiar with most is Arnold Schnitzer and Jeff Bollbach. Arnold and Jeff will chime in I'm sure and mention the other makers of note. In making handmade Double Basses, there are only so many one man can build.
Check out their websites and see what beautiful Basses they have made. Also, check out #4 from Jeff Bollbach with a handcarved Lions Head which is now in my possession. I call him 'Simba'.
http://www.aesbass.com/handmadebasses.htm
http://www.jeffbollbach.com/JB%20II/...llery/new1.htm
http://www.kensmithbasses.com/Double...h/Bollbach.htm