I bought a stock 98 axle at a junque yard. Cheap ($150), has a boat load less miles, good brakes. Make sure the r & p gearing is the same. Get all the mounting parts with it, so you have spares. Especially the top link (a-arm/ball joint device). I've had a couple with problems (one froze up at the pivots that mount to the frame).
The axle is heavier than you think. Bring a bud, or bring a dolly -- especially if she's cute!