I have lost our product key for Microsoft Streets and Trips 2013 for our business? Can someone please send me the product key, please?

Question

We have Microsoft Streets and Trips 2013 for our business. One of my colleagues cannot access his map without the product key. The software has been installed for years and I updated the map recently. One computer however will not allow access to the new updated streets and trips map with out the product key. Does anyone happen to have the product key for the Microsoft Streets and Trips 2013 that they could send to me.

Thank you Nicole