Being a south paw myself I feel your pain and having used both I prefer a LH action in all aspects now. I wouldn't worry about the 2" of barrel difference, as long as the fit is right. To me that is the difference between a great rifle and just a rifle!!!

Others OTC you can consider are:

Browning Abolt SS Stalker LH 22" barrel
Remington 700 CDL (Blue and Walnut) LH 24" Barrel
Savage has a number of LH action CF's as well. I know the Weather Warrior Series(SS) is not available in 3006 chambering though.

Best of Luck