This has come up before.
Try the widebody schedule from UA Cargo:
http://www.unitedcargo.com/utilities/schedules.jsp
The only international flights that aren't widebodies are, IIRC, Canada, Mexico and the Caribbean unless they've slipped a few ETOPS 752s into the European schedule.
Wow, that's a pretty cool list. If only they delineated which 763s were international config vs. domestic...
It'd be great for planning domestic travel.