I was able to resolve my question.  Here's the steps I followed in case others have a question about this.
After downloading the modules locally as I did above with
    npm -i <modulename>
1. Copy the module directories to a directory where the zeppelin user will have access to.  For example:
    /groupCode/helium/
2. Edit the module json file Artifact key to point to the new location.  For example, edit 
    /groupCode/helium/ultimate-heatmap-chart/ultimate-heatmap-chart.json   
Artifact would be /groupCode/helium/ultimate-heatmap-chart
3. create a symlink from the modules json into $ZEPPELIN_HOME/helium.  (I had to create the helium directory) 
For example
    ln -s /groupCode/helium/ultimate-heatmap-chart/ultimate-heatmap-chart.json   $ZEPPELIN_HOME/helium/ultimate-heatmap-chart.json 
4. restart Zeppelin in Ambari
5. Go to Zeppelin, choose Helium.   Select your module choose Enable