Custom tungsten ring?

I understand just how hard Tungsten carbide or ceramic, or alloy must be to work with. BUT if I wanted to have a truly custom engagement ring made from it can anyone make any serious suggestions? Every company I have contacted has declined it without even a thought. I understand that It cannot be cast, or fixed once cut, resized or anything. Just a little help I will link what I am looking to have made in tungsten. http://www.rothemcollection.com/pc/viewPrd.asp?idproduct=2675&idcategory=291 Except the accent diamonds would be channel set sapphires, and the center stone 6.5 mm would be tension set with no base. Please help me out. =( No one wants to do it. If you have any idea who could, or would want to please let me know. No other true engagement rings are made of tungsten. It would be unique. Maybe kick off a whole new era of rings.