(Mods, I posted this in Interior, Audio, and Electronics, but I suspect no one's seeing it there, so posting here. Feel free to delete if necessary.)

Hey everyone, I just bought a new set of visors (S1) from Mazmart, just $50 for the driver's side and $65.58 passenger side:
MAZMART - Serving The Mazda Community Since 1980. RX8 Sun Visors NEW OEM

My original visors are still good after 10 years, but at this price, I figured I'd get these in case they go at some point in the future.

(I have no relationship with Mazmart. Just posting as a heads up.)

 

The same part is available from the Rosenthal Arlington Mazda online store for basically the same price.

2009 + Mazda RX-8 Interior Parts

My passenger side visor broke from the heat a few years ago, and now it's time to replace the driver side too. I believe the culprit this time was a poorly fitting windshield sunshade, that exposed the visor to too much heat. My advice is to spend a little extra and get a custom-fit sunshade.

 

Thanks for the link. My passenger side visor broke a couple weeks ago. I might replace both.