Don't know, don't care, I would never cover any control lighting with blingy grills. Don't like the look, and wouldn't cover part of my light output. Visors don't block light, but are pretty 60-70s.
However, you need to know that valk turn signals come in two varieties, one screw mounts, and two screw mounts. I can't remember exactly, but am pretty sure all interstates have the same one screw mounts. That may help your search for these items for pretty standard metric cruiser parts.
I did stick Kuryakyn deep dish bezels on one bike to bling up the plane jane signals. I think they come with different color lenses, and I used yellows, just like OE. I think yellow up front is required, but red in back is OK. They give a nice small ring of color to the side (seen at night). Heads up, some 7 years later, the chrome is failing/bubbles and lenses are a bit cloudy.
This may not link to Honda Valk fitting parts, but they exist. Just to give you the idea.
https://www.amazon.com/Kuryakyn-2109-Deep-Signal-Bezel/dp/B000WK5N14