You may want to post on Tackleunderground where people have more experience with this.
A bait can not be patented. A unique feature on the bait can. I believe the Rage patent pertains to the raised ridge on the tail/craw, appendage. This single patent applies to all the Rage baits.
Sounds like you want to sell your idea and the patent that would go with it, rather than producing the baits and selling the product itself.
Carolinamike is a bait company on tackleunderground that could make the baits for you. Custom molds are pretty expensive and I would not be surprised if startup cost were $5000+.