Not sure if I'm allowed to post YouTube links, I can find any posting guidelines on here, but here's a guy replacing the bezel on a galaxy watch which apparently is the same process. https://youtu.be/ud9DksvJq3M
(He gave me the link to the supplier, so I could find the replacement parts)
And here's the bezel for the Frontier, from the same supplier.
Replacement bearings and gasket