chrysler bankrupt hasn't made parts hard to find, wrangler parts are everywhere.
secondly this job does require a few special tools. a harmonic balancer puller is needed, and usually can be rented at a parts store. also if you have the 4.0 motor there's not a lot of room to get the bolt out that holds it on, one big bolt in the middle. may have to pull the readiator to get an impact gun on it. i have a chain strap wrench to hold the pulley to use a breaker bar, but i wouldn't recomend it if you don't know what you're doing cuz you can cause damage with it. otherwise the engine just spins while you try to loosen the bolt. installing isn't very tricky but people have stripped out the bolt trying to tighten it down with only a thread holding it on, sometimes you have to hit it with a hammer a few times to seat it on the crank. there's a reason a shop charges 400 bux.