No blinkybox from the factory.
The rear wiper blade's incredibly easy once you know how. If you look at your new one, you should see two tabs. If you squeeze those together, it comes right off. The replacement pops right in. It's a little easier to swap out if you unpark the wiper first (gently lift the blade portion of the arm up and out to clear the parking stop under the glass), but you can do it as-is.
Dealer's the only place to get the rear blade (AFAIK) and the price shouldn't have been too bad.
2006 WK Laredo 4x4 4.7L
1993 ZJ Laredo 4x4 4.0L — Dead, sold, and rolling again