I'm trying to do the same thing--it certainly seems like the reservations are few and far between lately. But I definitely echo the touring plans reservation finder--just make sure you put in an email address and a phone number so you can get the text and pounce on it. I don't even think you need to pay for touring plans to use the reservation finder, you just have to have an account, which you can do for free.
This is prob a long shot, but when are you looking for dinner? I've got a 4:30 dinner reservation on 3/17 that I need to cancel. It's early, but if that's a date you want, we can coordinate.