Bent axle upgrade

It seems my axle is bent. I have a single axle 20' trailer rated at 3500lbs. I want to upgrade so this does not happen again.

This seems to be a common occurrence

Can I replace the axle with a 5000lbs and keep my hubs and brakes. Hoping I can go this route so I don't have to change my sweet aluminum rims. Lol

How do you know it is bent? All axles on trailers come from the factory with a slight up bend in the middle to accommodate wheel camber. How do you know it is a common occurrence? Going to a bigger stronger axle usually changes the bolt pattern on the wheels.