on the page that describes how to request a new repo, it should just provide a link to bugzilla with all the right fields filled out here's a starting point: https://bugs.gentoo.org/enter_bug.cgi?product=Gentoo%20Infrastructure&component=Gentoo%20Overlays&bug_severity=enhancement&op_sys=All&short_desc=new%20repo%20request:%20FULL_REPO_NAME&comment=See%20http://git.overlays.gentoo.org/git-request-template.txt
Overlays team doesn't have any website access these days.
The page mentioned at $URL is no longer displayed anywhere.