I can't find an equivalent in pax to tar's --exclude and --exlude-from
options. Am I missing the point somewhere?

(I would prefer to use pax, BTW, because I want to replicate *most* of
a directory hierarchy in another place. In the past I've done this by
piping the output of a tar cf - to the input of tar xf -, but this
seems wasteful if I can do the same thing with "pax -rw -pe ...")