Somebody here had a rear cladding for sale, new in box, a little while ago so hopefully they will pipe up.
When you say the front and rear bumper, are you talking about the cladding or the actual structural pieces behind the cladding? I ask because my front bumper (the tube beneath the cladding) is rotting out and I am headed to a local 4x4 fab shop this afternoon to see if they will be able to bend up a new one for me. I can keep you up to date on what I find out from them if that would help.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless