Take a look around on Etsy. You’ll find some pretty cheap on there that are likely much better quality than what you’ll find on amazon. Some offer personalization and others might have drawers for extra straps and such if that appeals to you.

What’s the budget? You can get some for 20-30 bucks all the way up into the hundreds for custom.

Barton has some packs you can get. I got my girlfriend one of their packs for her watches so she could mix and match different styles of straps.