I just ordered the blind Oscar rivets from McMaster Carr. I order from them weekly anyway. It's exactly what is called for on the install instructions. I can't believe that the installer at the dealer would screw up something as simple as this. The required rivet would actually be quicker.
Here is the link from McMaster carr again if anyone needs it.
https://www.mcmaster.com/97545A075/
Thank You again for the help.