If you mean a small-diameter setup for finesse fishing, the two Mayo's Hand Poured Baits 3 Inch Stick Bait 3/8 Diameter options are the closest lure matches: they’re compact, thin stick baits built for drop shot and finesse presentations.
For line, Official Sufix® USA Site 832 Advanced Superline® and the two Cortland C16 Super Braid options fit the “small diameter” idea well. They’re both braided lines meant for casting, sensitivity, and strength; the Cortland hollow-core options are especially useful for saltwater casting/trolling and leader connections.
Switch to a larger bait or more aggressive presentation if fish are chasing, the water is stained, or you need more profile. If you’re targeting offshore or saltwater fish, the Cortland hollow-core braid options make more sense than a finesse stick bait.