Your best bet is to find a 5.3.2 or 5.4.0 (or lower firmware and upgrade to one of those) system on Ebay or Craigslist, as exploits do exist for 5.5.X, but have not been publically released and are not guaranteed to be released anytime in the foreseeable future. They will most likely be released at some point (not a guarantee), but you will be most likely waiting a while.
All the whiny trolls on this site basically pissed off the very same devs that fed them, and a bunch of drama happened because the people basically demanded, cried, and whined trying to get their own way over the 5.5.X exploits, and the devs fought back by simply teaching them a much hard learned lesson and not releasing them. Always respect the devs that feed you.
We have no one to blame for the 5.5.X exploits not being released except for the trolls, they are the exact reason. Yet they still keep trolling..