I like lemm.ee

You can try the watch again with very low volume or some quiet alarm sound with no vibrate and leave it under your pillow.

Yeah, find an online store accessible to you such as Amazon and measure the width of your old band. You can then search 18mm watch band for example and they should have a bunch of choices. I usually get third party ones because they work just as well as original bands.

Sometimes watches like casio have special connectors but even then you can find replicas that work just as well.

Also just because the watch band says it’s for a smartwatch doesn’t mean it won’t work with a normal watch. Look closely at the photos/measurements and sometimes it’s just a normal strap you can use on any watch.