In short, no there isn't any other way to find directions out what key you currently have. Even if you got the lockset barcode from LR, you can then get that translated into the fob code that programs into the BECM, but as that's just the start ID for the lockset, it won't narrow down what actual key number you have.
Next time you are over this way, I'll try my checker on it and see what it comes back with