Well, I still haven't found them and am now using my spare keys. Dh and I shifted things around for Santa and now dd is getting an iou for the coveted item (to be brought home from work on Monday). It's the best solution, b/c work is nearly two hours round trip and I would have had to bother a coworker to let me into the building.
Thanks for all your suggestions.
I was surprised to see a couple of people suggest praying to God or a saint. I have done that in the past and usually it works. My dh has even asked me in the past to do that. This time my 'guardian angel of finding things' just said

. And she told me to remember what Christmas is really about.