Welcome to my "Southpaw" pain... I've never tried to figure out your situation working from the stock, and then trying to source the rest. You probably won't find any Lefty Savage actions out there. I looked for 2 years, but wound up just buying a brand new 111 Trophy hunter package, and then tore it apart for the action.... Sold off the scope and rings for $90.00...
I believe Tikka makes a lefty action, but I have no idea if you can do anything to them like you can the Savage line. For me, the 111 action was the most universal for doing a build on.
Good luck,
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