If you don't get any help on the Forum, I know this may sound bold but if you know of an apartment complex that has what you want, go into the rental office or ask one of the maintenance men/women walking around the complex. Maybe the brand-name is on one, and from there, you can search the WEB.
You may want to try a locksmith's shop too. Security is right up their alley. My best to ya and hope this helps.