I've used that same tubing bender before. It works fairly well on certain bends, but depending on how much of a tight curve there is, it doesn't always do the trick.
I actually tried bending one up for my Q-jet carb, but just couldn't achieve the proper bends.
I agree with Mr. Turna. Buy the length of tubing that's already flared and has the fittings at both ends.
I believe you can purchase the tubing that's a little softer and does not corrode like your common steel lines. What's nice is that you can purchase them in a variety of lengths.
I have heard about a trick to help bend steel line by packing sand in the tubing. It allegedly helps prevent it from kinking when you're bending the line.
Has anyone heard of this method before?
You have nothing to lose at this time by attempting to bend up your own fuel line. Just use your old line as a guide and go for it.