Yourself? A ready-made one, say from Frigo Designs?
(I'm talking over the range only)

How hard was it? How does it look?

I know I'd fall into every trap there is, and I don't have "the vision", but it seems like a good option?

I found a stainless shelf with a gallery rail on it (BOOS) so my things won't fall off the edge. The backsplash is the last piece of the puzzle.

I could have gone with the bluestar high shelf, which attaches to the back of the range, but I wanted sides on the shelf and also it cost a full third of the price of the range, which I objected to.

Thanks for any advice you have.