I bought one from Rock Auto but it was boxed wrong and wasn't even close to bolting up. Sent it back and received another one from them, it was also boxed wrong. I talked with the Rock Auto rep and was told the manual racks were no longer available, so I bought this Unisteer. Works perfect. Cheaper than a Burning Creek.
https://www.summitracing.com/parts/u.../model/mustang