Can you please suggest a rewrite rule?
My httpd-fu is not sufficient, I fear :-( It looks like mod_headers [1] might be able to help, though.
One simple rule I can think of is simply to *add* (if that's possible) an "X-Storage-Url" header whenever you find an "x-storage-url" header and use the same header value.
Regards ap [1] http://httpd.apache.org/docs/current/mod/mod_headers.html
