It depends on what you are looking for.
To me "Raised track bed" means some sort of ballast etc. For me, all of my layouts are raised - from the Caboose Layout that is raised about 5' above the ground and is composite decking mounted on 4' X 4's about 5' above the ground (the only roadbed is green outdoor carpeting. My garage layout is a dual deck built above the old pool table in the garage and the main layout is on plywood suspended 4' below the floor joists in the crawl space (green carpet again).
The main outdoor layout (2nd generation) is also composite decking that is level but the ground slopes from a few inches to about 8 feet.
You will never see my layouts in any magazine. I am not a craftsman and I build for ease of construction and ease of maintenance.
I've posted stuff about my layouts over the past 20-30 years but all there is to see are plastic building on green carpet stapled to plywood or composite decking. As everything gets older when the buildings come apart they often are given away or trashed as my track cleaner (leaf blower) often makes small parts disappear.
In all there is about 4,000' of track with about 150 electric turnouts. The important thing to me is that everything works or can be easily fixed.
The better you can describe what you would like to end up with the more likely that you will find someone who has built it.
When I started, my age and the average for the hobby was about 45 years old. Now I and probably most others are now about 70.
I suspect most layouts being updated or built today are probably smaller and higher.
I doubt there is much interest in Plastic, Plywood and Carpet layouts - but I and extremely glad that I built mine that way.