Re: Remington left hand short action.
I would consider going with a semi-custom action rather than a remmy that needs to be trued. It will cost a little more, but have the features you are looking for and probably have greater resale (if that day ever comes). Take into consideration the purchase and trueing of the factory action, add sako or m16 extractor etc, and the cost is nominal.
Take a look a Stiller Predator available in left hand and left port.
Just my two cents from experience.