The mounting points on the UE46C8000 are the VESA compliant 400x400, so there is a very good chance you could reuse the wallmount if it supports that.
Otherwise you can pick up a genuine Sansung slim wall mount on Amazon for about £90, much less than Curry's, etc would charge. There are even generic versions of that for about £15, but it depends how much you would trust them to hold a brand new set..