MAC, alone, won't help any of us to find it for you. Sorry.  Without having access to your cellular provider, we wouldn't have an IP to associate to it, and therefore, no way to even BEGIN to know where it is.  If anyone could find it, it'd be the cellular carriers, who could triangulate it based on tower associations, etc.  However, this occurrence is so frequent, that I sincerely doubt they'd go to much effort, on behalf of a single user / device.

Sorry, eaokinyemi02.

Now this brings up an interesting point. Many times in tv shows or movies, we seel that LE has the ability to ask/have a service provider track a piece of hardware be it cell phone, or a vehicle, etc. Is ther any precedent or possibility of an individual forcing a SP to do this? I mean, why couldnt the OP theoretically get a court order for the SP to locate the device? It could possibly act as a theft deterant if individuals knew a person could get an order and take that order to the SP, and with the requirement that the information be provided to LE, LE would track down the item and arrest the thief.

I can see a few problems with this, but I think it would be worth a shot.