I can confirm that Kempelton's been in the AMO review mill for quite some time - see https://addons.mozilla.org/en-US/firefox/addon/kempelton-reloaded/versions/ to get the most recent, but currently-unreviewed version. In addition, PMR's is here: https://addons.mozilla.org/en-US/firefox/addon/past-modern-revisited/versions/
Kempelton Reloaded Large will be coming soon, though it does have a version that will work (though may not have full compatibility with new interfaces etc); try looking here: https://addons.mozilla.org/en-US/firefox/addon/kempelton-reloaded-large/versions/
Sorry for the wait! I've been fairly busy as of late, so haven't had time to update.
EDIT: Kempelton Reloaded appears to have been released on AMO. Enjoy! The other two will still need those links to reach the newest versions, however.
