The basic OptiVisor design should work for you. You can buy the original OptiVisor, but you find many other brands with the same basic design. ddp59's link shows one such standard model. I have one just like it, that I bought at a modeling show. It's a Red Chinese knock-off that went for ten bucks. As soon as I tried it, I wished I had bought it years before.
If I had to do it over, I would get one with lights, though. My workbench is well-lit, but even so, I would find it helpful to have additional lights aimed along my line of sight to the piece I'm working on. Again, I can buy OptiVisor's lighted version, or find an off-brand; they're all built to the same design.
Hope that helps!
Best regards,
Brad