Welcome to the wonderfully frustrating world of being a left handed shooter, my name is Outlaw & i'm you club president
I run a 20moa NightForce Direct Mount on a LH Rem 700 in 6-284:
I also use 20moa Badger Ordnance on a LH Rem 700 in 338RUM:
My current go-to manufacturer right now is Murphy Precision. Pictured is a stainless 20moa pic rail on a Stiller Short Action. I have two of these actions both wear the Murphy Precision Rails.
I know Seekins makes great products, I just haven't used any. If you need any more help, let us know.