If y'all are desperate to not leave your house you could still support a brick and mortar shop for chains and other things:
https://www.retro-gression.com/collections/chains
Jeff Bezos is literally the richest man in the world, he does not need your money and his employees don't see much of the money so you aren't doing anything good by supporting his company.
Scrodzilla is a small business owner with a good global reach and actually gives a crap about the single speed and fixed gear community and cycling in general and also they like good music.
If not Retro you have other like Soma Fab:
https://www.somafabshop.com/shop/cat...ernal-gear-746
Or there is the hip and cool MashSF:
https://shop.mashsf.com/components/drivetrains/
Even CityGrounds is a better company to support than Amazon:
https://www.citygrounds.com/collecti...e-speed-chains
Think about your choices, that little you save doesn't really give you much and only seeks to make a multi billionaire even richer. Go down to your local shop and patronize them, they will be happy to see you and want to help you out.