Here's a place to start:
http://www.arche-headshell.de/
Also check The Audio Beat:
http://www.theaudiobeat.com/blog/smartractor.htm
I believe the 'SmartTractor' now may be their main offering.
http://www.arche-headshell.de/
Also check The Audio Beat:
http://www.theaudiobeat.com/blog/smartractor.htm
I believe the 'SmartTractor' now may be their main offering.