https://kingcage.com/products/iris-king-cage
Stainless steel so bottles don't get marked up.
Stainless steel so cages don't snap or crack.
Stainless steel so bottles stay in place since that's like the most basic expectation for a cage.
MUSA, for what it's worth.
If you want it in black-
https://mythcycles.com/product/powde...ng-cage-black/
If you want a different shape...
https://www.amazon.com/Arundel-Stain...BoCzBQQAvD_BwE
https://www.biketiresdirect.com/prod...hoC-wkQAvD_BwE