Your search for "axle repair kit" revealed the following:
Do You Really Need a New Trailer Axle?
A bad hub, noisy bearing, worn brake, or damaged spindle can make it feel like the entire trailer axle is finished. Sometimes it is. But many trailer axle problems are actually failures of the serviceable parts attached to the axle — bearings, hubs, drums, brakes, seals, or the spindle —...
How Electric Trailer Brakes Work — and How to Troubleshoot Them
Electric trailer brakes are a chain: the controller sends power, the wiring carries it, the magnet reacts, and the brake shoes use the rotating drum to create braking force. When trailer braking becomes weak, intermittent, uneven, or completely absent, the fastest diagnosis usually comes from finding where that chain stops...