You may be able to utilize the Williams side mount, using theor HCO (High Central Overbore) rings reversed to offset the scope C/L even more to the off-side.
Pictured above with their QC Split Rings, you would order an appropriate base for direct mounting or adaption and the QC HCO Rings or QC HCO High Rings.
http://www.brownells.com/aspx/ns/sto...NT%20&%20RINGS
.