Andre,
I was able to get another eval license for vSphere 5 and ESXi5 from my regional sales rep and was able to add the new eval license to the current platform. My evaluation platform will now expire at the end of August giving me plenty of time to complete the build out of our new permanent environment. And no, it doesn't look like the vSphere 5 and ESXi5 eval licenses are available without going through the sales department.
Thanks again for your help and suggestions. I'm glad I was able to forgo the transfer of the permanent license from the eval platform to the permanent platform.
Much appreciated.