The Kum and Go that didn't have it:
720 N 108th Ct, Omaha, NE 68154 · (402) 496-9586
But I forgot to ask if they were just out of stock.
The one that did:
1819 N 72nd St, Omaha, NE 68104 · (402) 827-8112
and said Lean was very popular there.
Another I didn't call is:
6606 Blondo St, Omaha, NE 68104 · (402) 554-0717