Lots of ways you could do shapes similar to that.
CNC milling as Skulker says (although you can make your own CNC machine for cheaper than buying one... still in the hundreds of dollars, though). Casting, like Hanes linked (easy-melt metals like Pewter make it not too hard). You could use soft metal and hand tool it to shape with files etc. Or you can cheat and make it out of plastic or some other material and give it a metal finish.
To get that exact kind of finish youd need to mill it, though.