Baja/Tank 250 Rebel Clone Parts help

[dzero]

I picked up a Baja 250 that had been sitting with broken plastics on the very very cheap, 65 miles on the clock. Got it running without any issues and took it for a spin; when I had been pushing it around I had noticed it felt like the rear wheel was dragging, I figured it was rusty brake pads.

Well the rear wheel locked up solid while I was riding it(at low speeds and in my neighborhood). The rear wheel bearing is seized to the axle shaft, are these parts obtainable? I want to replace the front while I'm at it, or this thing is going to be a death trap.