REVO Walking Pad Treadmill for Home with Remote | Portable Under Desk Treadmills with 0.5-4mph Speed Range | Backed by 2 Year Promise

Not sure if you're still looking for something quiet but I have this awesome walking pad treadmill by revo from Amazon that I use while I'm working or watching TV. It's super sturdy and durable and you can tell it's built to last compared to the other plasticky ones. Here's the one I got: https://amazon.com/revo-portable-walking-pad-treadmill/dp/B0CG79PQDG/