I have 4 rigid shanks for the Dearborn 13-1 or 13-3 cultivator. 2 are the inner fronts, part number 131041 and 2 are the outer fronts, part number 131037.
Each has the mounting hardware and some old sweeps attached. Choice out, $20 each or all 4 for $70, picked up my location. e-mail is open.