One piece base help

I've had a Farrell base on my rifle for a while now.
It's a great base, but is too tall for me.
I've got my lefty setup w/an HS stock (varmint?), Shilen heavy 260 Rem barrel, and Elite 4200 4-16x40.
I need a left hand, one piece (Picatinny preferred), low base for my rifle.
I'm just not having any luck with a good cheek weld and my setup.
I'd prefer not to have to use a cheekpad, especially since there isn't much for a southpaw.
Thanks!

What rings are you using?

I'm using the Leupold rings. I can't remember the height right now.