Hook pre-existing pages to Multipost master pages

I’m setting up a network of sites for a white-labeled iPhone/Android app that all use the same theme & general content but each have their own theme options to upload logo, screenshots, app name, etc. We are using the WP Replicator plugin to set up new network sites to copy the pages, widgets, etc from the “master” site that I’ve created.

Because we want to have global content that trickles down from the master site to corresponding pages on the sub-sites, I have installed Multipost MU. However, when I publish/update a page on the master site, it creates a new version of the page on the child sites. If I delete the previous child site page of the same name (from the original replication) and update the menu with the new page that was created, all further Multipost updates to that subsite/page work fine.

However, this is a pain in the rear to do across a large network of sites and kind of defeats much of the purpose of using the Replicator plugin.

My question is this: Is there a way to hook an existing child page to the master page? I would love it if Multipost had an option to match the permalink slug of the selected child sites in order to make a match for updating. Any suggestions?