Anyone have an exploded diagram of the front and rear bumpers for a US Spec 1978 450 SEL? The ETM speaks only of the European type. Thanks!

I plan on rebuilding these bumpers. I didn't like them on my SD because they stuck out too far, but it seems that on the 1978 SEL they're set in a little more, and they are in good enough shape they wouldn't need much to be brought to par.
What parts of the assemblies are still available? or is it all junk yard gold now?
More specifically the top covers.

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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