Hey wishmaster, Kettlebell workouts are great! Unfortunately, most places only have up to the 20lb kettlebells ( I called around). You can get the 20 lbs for a decent price @ Kenny's in Westmall for around $280 - $350 as I can't remember the exact price.
The better thing to do is just make your own as it will be *much* cheaper and well you can scale up to as much weight you need..
Here's a video showing how to create your own Ala Tim Ferriss:http://www.bodybuilding.com/fun/tim-fer ... lebell.htm