There's a dealer here in OKC who has quite few lefty rifles in inventory.
That would be Jerry Noblin.
Everyone tends to forget MRC started out as a supplier of "gunsmith ready" CRF actions (and barrels), sort of like the "95% inletted" stocks Fajen and Bishop used to sell. The actions still required a substantial amount of labor to be functional and that disappointed a lot of people who wanted something they could simply attach to a barrel, drop in a stock, and head to the range. (There were also delivery issues that appear to have been exaggerated.) It doesn't seem like they quite closed the loop on that.
None of this bothered me when I bought a left-handed CM 0.473" bolt face action from them in the fall of 2006 for $460. The gunsmith who built the resulting 7mm-08, Mark Penrod, wasn't quite as enthusiastic. The action was so rough and required so much additional labor to feed and function correctly that he called this out on a separate line item on the final invoice. He still brings this up when we talk. (The rifle feeds and shoots just fine now, but it was frustrating for him to get it there.)
With that knowledge, it was difficult for me to take MRC seriously as a rifle manufacturer and the cost increase of the bare actions turned me away as well.