You need to start with 901-3050-xx00, for a ZD3000 with 50 AP license,
then add 901-??? for additional 50 AP support, to allow your ZD3K to manage
up to 100 APs.
I know the part numbers for support, 801-3050-1000 and 801-3050-1L00 for
the ZD3050 and extra 50 APs once you have the 901 ordering part numbers
for the ZD3050 + 50 more APs.