Is it Waitaki Engineering that make rails?
Maybe get in touch with them and see if they can make you one....probably cost you an arm and leg. Or you could do what i did and get a set of Talleys and put a 30moa cant on them. It takes a bit of time and effort but easy enough to do, I did 20moa on mine in about 10 minutes. Pm me if you want more details.
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