Amazon.com: The Trailer Parts Outlet 3500 lb Light Duty Single Trailer Axle Kit with Suspension - Leaf Springs, Hanger & U-Bolt kit (85" Hubface - 70" Spring Center (6'0 Frame), 5x4.5 Bolt
The Trailer Parts Outlet - 6000 lb TK Tandem Axle Trailer Parts Kit - 12K Capacity Light Duty (Complete Original Series), 73/58 Hubface/Spring Center - (5'0) Frame Width - Walmart.com
14k Rockwell Tandem Axle Trailer Kit - 2 Idler Axles