Unfortunately ABO/Omegaverse fics are more common in newer fandoms :'( The only other fic I know of other than the one you've rec'd is I Was A Teenage Werewolf (http://harrydracompreg.livejournal.com/184971.html) (warning: mentions of mpreg)
(I guess the equivalent of omega!draco could be veela!draco though? It's not exactly the same but they contain similar themes such as heats/mating season/etc.)