Wolf has used Broan blowers in the past. We don't know whether any Wolf-specific requirements are imposed on Broan-supplied components.

Here’s how I’d do it:

And this is kind of like you’re describing:

Thank you Sammy. I like the look of the riser with shelf but the shelf would always extend over the cook top while the backsplash options I posted have shelves that fold out of the way. I suppose my ideal scenario would have a riser with fold up shelves, or a riser with fold up shelves mounted directly to the wall.

What about a Bluestar back guard? Have you seen them in person, or do you know exactly how they work vis-à-vis the shelf? These are pics from their (very terrible) gallery:

You could, like you said, mount something to the wall above the riser like this:

I believe Richelieu makes an accessory rail system like the one seen above.

P.S. Are you concerned that a solid shelf will interfere with the air flow?

I would ditch those “warming racks”. What you’ve pictured are just racks anyway. They end up being pretty useless, and one more thing to clean. Nope.

The authors of a report I once read, perhaps associated with the California Air Resources Board, were surprised to discover that shelves -- under a commercial hood -- did not interfere with capture and containment. I don't recall now whether the hood under test had side skirts or not. The shelves were probably higher than those shown in the images above; commercial hood entry apertures are typically at seven feet from the floor.

If one's air flow rate is marginal with a residential hood, then there might be some turbulence induced spillage at the sides. Also, the blue RNB photo shows a shelf all the way to the side cabinets. Surely the rising plumes from rear burners will be spilled both toward the cook and to the sides under the cabinets. It is unclear how well this spillage might be captured by a hood that does not overlap the front or the sides of the cooking surface.

I would like a warming rack because my hood will have integrated dual heating lamps, and I otherwise have no warming drawer. I think it would prove useful when preparing multi-course meals.

The stainless range submitted by Richard Lang is what I originally had in mind (in 36 inches rather than 30), but its a hood with the same width as the range. It seems since multiple manufacturers offer these backslashes in sizes like 42, 54, 66 inches there must be a way to install them, I just wish there were some pictures showing that configuration. I contacted both Wolf and Bluestar and haven't heard anything back yet.

Its good to to know the more solid shelves may not interfere with air flow too too much. One of the reasons I preferred the wire fold up versions is I thought it would allow much better airflow while still providing functionality.