0.38-in x 10-ft Black Steel #3 Rebar in the Rebar department at Lowes.com
Weyerhaeuser 3/8 in. x 3 ft. #3 Rebar 05385 - The Home Depot
MAKO 3” Rebar Support Chair with Flat Base (Pack of 500) – Fits Bar Sizes 3-5 – Heavy Duty & Durable Plastic Concrete Rebar Stand Holder with Snap-in Mount (color may vary) - - Amazon.com
Reinforcing Rebar, #3 Bar, 3/8" Diameter x 20' Long, Grade 40 - 6467937 | Kuhlman Direct Online Store
Amazon.com : Coyote Landscape Products 5 Piece of No.4 Rebar, 1/2" x 3' x 36" : Tools & Home Improvement