For prototypes what a lot of guys do is take an existing similar hook and modify it wth a couple pairs of pliers.
The big hook makers are very secretive about their processes. One hook company that I get on with pretty good has said their primary manufacturer will not let any of them in the processing areas at all. I have been told that the minimum price tag for a production run of hooks is $50K from any of the big players who know what they are doing.
If I was going to tackle a prototype hook, I'ld probably start wth the "modify somebody else's hook" approach to start. KEEP IT SECRET AS LONG AS POSSIBLE. The tackle business is very cut throat.
Then find a fairly hard work hadening wire, and some wire forming tools. I doubt a Boggs wire forming tool would be upto the task. You might keep your eye out for a used programmable spring making machine on Fleabay. It woud be ideal if you could find a wire that is.
Hard
Formable
Work hardening
And will possibley accept case hardening.
Highly corrosion resistant would be nice, but I don't think its quite as important as selling people on your design idea. The thing that makes it special. Eagle Claw has been selling hooks that will rust for a very very long time.
Some folks want you to believe it will cost you more than its worth to make your own hooks, but I believe its doable. Expensive, but doable.
Bob La Londe
http://www.YumaBassMan.com