1969 Dart power steering valve assembly

I think I'll be tearing the engine bay down once I coral the bits I'm missing. I found the cook book steps in the FSM and yes it reads straight forward until you open something up and springs fly everywhere. I've hunted around the web and the valve assembly does look the same on both platforms so I'll likely take a punt. Thanks for the Rockauto suggestion too.

***Update***
Just jumped under the motor to read the PS box p/n 2267262 which matches the p/n on the for sale ad so I'm happy with this that there's compatibility.
Springs don't fly everywhere. Tear it down as the manual states, and keep the components together. There are only two major components initially. The sector shaft and the piston/worm assy. The piston is the only thing that comes apart as it is separated from the worm assy. Stand the thing up, and disassemble one piece at a time laying it out on a large work space in the same config. as you took it off. It will look like an exploded diagram if yo do it that way. You'll figure it out. Take your time.