Originally Posted by desertsherpa
Here are the part number cross references.
One of the next steps would be to see if these have any other applications.
Great info DSherpa---thanks for doing the research!
Ford--to my knowledge---doesn't have a "where used" search function through their normal parts departments. The prefix 4 digit in the part number tends to say on what chassis and year a part was used, the X substituted for a number that covers a single or multiple years as might be necessary to specify.
The xC2Z- typically designates it was a part used on a Ford E-Series. The second field being the "call out" number which identifies it more specifically, in this case a body/frame cushion etc. Any digits or letters following will typically say if its a newer design or slight variation of the original part.
Also keep in mind any part number is subject to being superseded by another number but its the same part fit, function and installation-wise.
Since Dorman---whose said to be an OEM supplier of some parts---has conveniently grouped the various Ford p/n's under a single one of their's says the bushings are somewhat common in assembling Ford bodies to frames.
Any of the numbers you list should be very useful finding the exact part from a seller somewhere. I used several posted doing a quick Google search and found a number of NOS Ford parts, more than enough Dorman parts to fit most needs.
From that POV I'd say any part bought under one of the listed numbers could be considered "factory" as they'd be direct fits.