Hi TRovner,
I am with the Symantec Enterprise Customer Care Team, a.k.a. "Licensing".
Symantec Endpoint Protection does require a current support contract to maintain eligibility to continue using the software. If the support contract expires and is not renewed, then the software would need to be uninstalled from the machines.
I cannot speak specifically to SKUs, but anyone in our Symantec Sales Team or your Symantec Account Manager would be happy to assist with getting the correct SKU.
If you are located in the Americas region, you can call 1-800-745-6054 for assistance. If you are a reseller yourself, you can call the Channel Inside Sales Team at 1-888-780-7962 for assistance with determining the correct SKU.