2 words - Ebay, Ezy....

As long as there's an existing pickup, you'll just be replacing one set of wires for another...
If you don't know what pickups you want - that's another story. But if you find the ones you like - Distortions, Invaders, Customs, etc - it will just be a question of 4 screws, 2 pickup screws, and a few solder