Timney and Riflebasix for sure have 700 triggers for LH action. I have a Timney in custom 700 LH. You can also get your trigger adjusted, tweaked or rebuilt by a good gunsmith. A 700 trigger can also be adjust by yourself if you feel confident in your abilities &/or can follow instructions!

[link]http://quarterbore.com/library/articles/rem700trigger.html[/link]