Scott,
No, guys make custom molds all the time with special hooks that they like. So as you can see if you want a jig that a jig maker made, and you have to have it because " it's the only jig that works for you". Then you have two options. #1 Keep buying them from him, or modify a mold to use the hook he has. If you use a lot of these football heads with those hooks then it would be worth your while to mod a mold. If you use a dozen jigs or so a year. It's cheaper to keep buying them from him. The cost of making them yourself many times does not outweigh the cost of buying them. Many guys make custom molds for this reason. So the jigs are different and if they happen to catch on, they're the only game in town selling them. Honestly I would look for a differnt hook and call it a day. Fishing to me is 95% about presentation and trying to find where the fish are. The other 5% is luck and color. Just my 2 cents worth.