I believe that's the Citizen ref AU1065 58E from Citizen's Axiom collection, powered by the caliber J165 movement.

Here's the product page, but the watches are available for a discounted price e.g. here, either on a bracelet or a strap.

You could try to contact Citizen to find out if they have one or both as replacement items for sale, but there's nothing on the website. FWIW, I've seen bracelets on eBay and I suppose that would be your first port of call. Good luck!