All Small Six Rack and Pinion Conversion

This relates to all small sixes
I am doing an electric power steering conversion on my 65 mustang with a Toyota Prius electric assist. Trying to find a manual steering rack from another car with less than 3 turns lock-to-lock and with 6 inches of travel. Has anyone already found a rack that fits the bill or know something close? I really want to have less than 3 turns LTL, but 5 or more inches of travel would be okay. Thank you.