Amazon.com: SwingMate Porch Swing Springs (Set of 2) - 600 Lbs Capacity, for Heavy-Duty Suspensions, Safe for Hammock Chairs or Ceiling Mount Porch Swings - American Made - Rust Resistant - Chrome :
Amazon.com: Platform Rocker Recliner Springs or Rocking Chair Springs | 5 1/8" Long x 3 9/16" Wide | Recliner Springs Replacement Parts for Rocker Chair, Spring Tool | RS-42 : Home & Kitchen
19th Century Rocking Chair on Springs For Sale at 1stDibs
Vintage American Style Walnut Framed Rocking Chair Sprung With Springs | Vinterior