Copy email address from page to a different part of the page, across the whole site?

Hi

Does anyone know of a way, other than a page at a time to
copy a email address from with the source code and paste it
in a different place in the same page.
But be able to do this across the whole site.

Here's the code -

<!-- #BeginEditable "Name/Email" -->
<input type=hidden name="Establishment-name" value="This is our enquiry
form">
<input type=hidden name="Establishment-email" value="a (AT) bcd (DOT) co.uk">
<!-- #EndEditable -->
<input type=hidden name="required" value="Name,Tel,Address,Country,email">
<input type="hidden" name="sort"
value="order:*,Establishment-name,Establishment-email,*,#,Name,Address,Postcode,Country,Tel,Fax,em ail,#1,Date,Month,Year,#2,Nights,Persons,#3,Single ,Double,Twin,Family,#4,Extra-Info,*,*,cswu.com">
<input type=hidden name="*"
value="*****************************************">
<input type=hidden name="#" value="------ Customer contact
details ------">
<input type=hidden name="#1" value="------ First night of stay ------">
<input type=hidden name="#2" value="------ Number of nights & persons
staying ------">
<input type=hidden name="#3" value="------ Room(s) type required ------">
<input type=hidden name="#4" value="------ Extra information ------">
<input type=hidden name="subject" value="Booking Enquiry">
<input type="hidden" name="redirect"
value="http://www.mydomain.com/enquiry-confirmation.html">
<input type="hidden" name="print_blank_fields" value="1">
<!-- #BeginEditable "fwd_address" -->
<input type="hidden" name="recipient" value=room-enquiry (AT) mydomain (DOT) com>
<!-- #EndEditable -->

I have hundreds of these pages with the same code in it, though each email
address at the top is different
and I want to copy the email address from the top and add it in as an extra
recipient. i.e.. ending up with -
<input type="hidden" name="recipient"
value=a (AT) bcd (DOT) co.uk,room-enquiry (AT) mydomain (DOT) com>

Maybe a find and replace might do it?

Many thanks

Craig.