I put a lefty Mk II in a chassis from rigidalloy.com. Not a big name in the rifle chassis world.
https://rigidalloy.americommerce.com/srf_chassis-47.aspxNot one of the prettiest chassis out there, but worked as advertised. Price is right, too. Note that depending on what you want to do, you may also need their Rifle Stock adapter. With my MkII, I saw an average of 0.3" smaller groups at 100yds vs. the thumbhole stock that came with the Savage. Not a huge improvement, but consistent. I hadn't done any work on the thumbhole stock prior to putting the chassis on, at some point I need to pillar and bed that thing. I didn't find the chassis comfortable to haul around the woods after squirrels at all, but worked great on the range.