Fast forward a few weeks later I was digging around in my camera trunk and found some 37mm Nd filters for my Gopro. I sat them out to go in the trash since I never used them. I trough them on the table and sat down to clean some lenses from a earlier shoot. I had the Rokinon 14mm out cleaning the front element when I bummped the table and knocked the 37mm filters onto the floor. After I picked them up I noticed the rear mount on the Rokinon had a relief milled into it. So by chance I stuck the 37mm filter into the rear mount and it was a perfect fit. I mounted the lens onto my Sony A7r and it worked!!!!!! Its a perfect fit, the lip of the filter sets flush with the rear mount and is held in with just pressure. Now the drawbacks, I have to set my focus then remove the lens, install the filter and reconnect then shoot. This method will not work for a CPL filter due to the rotation of the filter relative to the sun and the lip of the filter is a milometer larger and preventing mounting the lens.
