Steering Coupler rebuild kits

in my 66 ddart, with the /6 and power steering, I am getting ready to swap out the steering box, but at the same time I want to be ready to rebuild the steering coupler if needed. So I would like to have the kit just in case. I am finding many kits with an orange piece, but they all say good for 67 - 75 dodge cars and trucks. Can anyone give me a solid link to a kit that will work for my application? RockAuto has nothing. Thanks guys. Gonna do this next Wednesday