Breadcrumb Pro does not currently sell replacement cash drawer keys through our hardware store. However, you can purchase new keys at the manufacturers website.
To ensure you select the correct keys you will need the lock code (stamped onto the lock, and can also be found on the bottom of the drawer).
Lock Code: http://www.mscashdrawer.com/frmKeys.php
Once you have the code you can purchase additional keys at the manufacturers website:
Manufacturer's Website: http://www.mscashdrawer.com/frmKeys.php