I work at Discount Tire Co. so i do this every now and then. All you need is a mini sledge or hammer and a socet that you wouldn't care about tearing up. the socket needs to be not to big to slide over the whole thing, but just big enough to grab the outside. beat the socket on the lock with everything you got, and we use an impact, but a breaker bar might work. if you bought a kit it would be easier, since they give you sockets that taper in and would go on easier. well i hope this was helpful. let me know if you get it off or have questions.
Addition : I didn't read all of the post, now that i read it there ARE wheel lock kits with 5 locks and a key. Gorilla makes it, you just have to call them to get it. I have a set of 5 on my TJ. And if you use the beating the socket on method try not to miss the socket. If the guy with the 20" centerline wheels reads this im sorry i have bad aim :brickwall