I have a small idea, forever when seen a app for package on foresight, im came to rBO site and search if someone packaged.
Some equal it's:
conary rq --labels --install-label zodyrepo.rpath.org@rpl:devel | grep -i <app>
My idea its make a python script what first download all packages, doing the conary rq to specific repositories, and get the name with labels and save its on sqlite3 db. For then do querys for search package on db and not on rBO
Something like apt-cache search and apt-get update.