Here's another alternative to the HF bender. I've bent up stuff with it and for the money it works great. You can even download the plans off their website and just buy the dies. It's a mandrel bender and it's barely any more expensive than buying a HF bender if you build it yourself.
http://www.pro-tools.com/200.htmFAR BETTER than the HF bender. I hate the one I bought and only use it to bend my tube back if i go a little bit to far on my mandrel bender.
This is what I use. Its the cheapest mandrel thats air/hydraulic I've found. It uses the same dies as the 200
http://www.pro-tools.com/302.htmThis is the only thing I'd use the HF bender for.
Here's what I've done with my one shot bender