I'd recommend Metro Lock Service. We have a business account with them, and we've never had to worry about getting overcharged or anything like that. They handle our account really well. Pretty much anything we need, they order if they don't have it in stock. The average wait time to get my orders completed isn't very long. They provide prompt service.

I have a pretty good rapport with the locksmiths themselves. They're really easy to talk to, and they're generally nice guys, plus they're really helpful. They understand that when you need lock service done, it's usually an emergency. They treat the job with the gravity it deserves.