Just Pickups has a good selection of Fender Tele pickups, at great prices. They also have telecaster pickups made by other manufacturers as well, and of course pickups for other models. I ordered a set of the Fender Custom Shop Texas Specials, and got them well below retail price. They arrived in perfect condition in the sealed factory packaging, and sound great.
I wired them with a 4-way switch to get parallel and series tones, and it works fabulous. If you are looking to hot-rod your guitar with aftermarket pickups, this is the place to shop.