As mentioned, LC is the way to go for open pour molds and they have a ton of swimbait models. God knows they have a bunch of my money. LOL. I'm sure you can find something very close, if not exactly like the spark shad. BTW.......that is my favorite swimbait as well. Simple yet very effective with killer action!
Once you start pouring and learn a few things, you WILL want more molds. No doubt about that. The great thing about a swimbait mold is they are super easy to pour. No major appendages, claws, etc. Just one pour and done.
Also when buying molds, try to stick to the baits that YOU will use and stay away from starter molds.
Good luck!