Yes, you can upgrade your LE lock to an LEB. You will need to change the whole inside portion of your lock. This is the only part number needed.
Here are the part numbers according to your LE model:
Greenwich inside trim assembly - Complete trim minus battery cover, battery holder and mounting screws
47270612 - Mobile enabled mortise deadbolt (BMD)
47270613 - Mobile enabled mortise with push button (BMB)
47270614 - Mobile enabled mortise with LED (BMS)
Addison inside escutcheon assembly - Complete trim minus battery cover, battery holder and mounting screws
47270616 - Mobile enabled mortise deadbolt (BMD) Complete escutcheon
47270617 - Mobile enabled mortise with push button (BMB)
47270618 - Mobile enabled mortise with LED (BMS)
You will have to put in your finish after the part number. Example: 47270612 - 626
INFORMATION PROVIDED THROUGH THIS SITE IS PROVIDED TO YOU AS IS WITHOUT ANY EXPRESS REPRESENTATIONS OR WARRANTIES OF ANY KIND, AND WE MAKE NO REPRESENTATION OR WARRANTY THAT THIS SITE(OR ANY INFORMATION PROVIDED IN RESPONSE TO YOUR INQUIRY), WILL BE ACCURATE, COMPLETE, OR ERROR-FREE.
YOU AGREE THAT YOU MUST EVALUATE ALL INFORMATION AND RESPONSES, AND THAT YOU BEAR ALL RISKS ASSOCIATED WITH, THE USE OF THIS SITE, INCLUDING ANY RELIANCE ON THE ACCURACY,COMPLETENESS, OR USEFULNESS OF ANY INFORMATION OR MATERIALS MADE AVAILABLE THROUGH THIS SITE.