Search and Replace on master pages

is there way search , replace on masterpages.

example: there 30 files in .book document.
on 20 files header , footer must change.
the header , footer on master pages.
can p. e. change "haeder1" "header1" search , replace?

right on way:

open files in book
set view masterpage manually file per file (30 times).
search "haeder1" , replace "header1" (option search in book)

is there way faster?

thanks in advance
sander gheldof

write or purchase framescript...

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