Salvage yards would be a good place to start looking.
this might do ya.. http://www.installdr.com/Harnesses/Ford-Wiring.pdf -= TWiG =-
Heavy Duty
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The 2007 Ford F-250-Super-DUTY has a 6-speed manual.
The 2005 Ford F-350-Super-DUTY has a 6-speed manual.
The 2010 Ford F-350-Super-DUTY has a 6-speed manual.
The 2001 Ford F-250-Super-DUTY has a 5-speed manual.
The 2010 Ford F-250-Super-DUTY has a 6-speed manual.
The 2009 Ford F-450-Super-DUTY has a 6-speed manual.
The 2003 Ford F-350-Super-DUTY has a 6-speed manual.
The 2009 Ford F-250-Super-DUTY has a 6-speed manual.
The 2003 Ford F-250-Super-DUTY has a 6-speed manual.