my aro ring is from amazon, it's ceramic and was pretty cheap (its white but it comes in black too), and my ace one is from amazon and has a rainbow on the inside.

Here's links if you're interested, I prefer my ceramic one bc the metal one got scratched and looks less black now.

ceramic- https://www.amazon.com/gp/product/B07237GX32/ref=ppx\_yo\_dt\_b\_asin\_title\_o04\_s00?ie=UTF8&th=1&psc=1

rainbow inside- https://www.amazon.com/gp/product/B091GPDNBQ/ref=ppx\_yo\_dt\_b\_asin\_title\_o04\_s00?ie=UTF8&th=1&psc=1