I will make a 3d model of a ring, fitting your size according to the sketch or picture you provide. You will receive an .stl file and RENDER file .jpg. After receiving .stl file you can ask any jewelry manufacturer, which uses 3d printer, to make this ring in metal and soon you will have the ring you desire :)
Half an hour of modelling costs 5 USD. So the final price will be given to you after checking the sketches.
I can also provide the source file with your model for extra charge, so you will be able to modify it in future. I can give ALL RIGHTS for you for extra charge also.