@wikiwide : Not that one. http://ftp.gnome.org/pub/gnome/sources/gtk+/2.14/

i took this one ( from the link ) ( and 2.18.0 from there only ) and debian/control from the package you mentioned. And then compiled it. ( with glib 2.22 installed and deleting all the things having "doc" in debian/control line gtk-doc...something something)

It compiled successfully but installation seems to break things.

Just an idea :
why not simply patch the things ( functions added in later version & removed in previous version ) from 2.13 - 2.18 to 2.14.7-maemo( the one you mentioned ) and recompile it.

Gtk 2.18.0 has dependency on glib 2.22, so i think versions before that should not have any extra dependency that could not be full filled by things already repo.