https://www.cdc.gov/flu/professionals/antivirals/summary-cli...
Second, in 2003 Roche upped production. So yes they sat on it. SARS was in 2003 - and it takes 12 months to produce. What Roche was producing pre 2002 would prove or disprove the story, but I can't find this information anywhere -- I would gamble not much.
"It's pointless to look at ways for outsiders to produce Tamiflu, Roche's Reddy says. He notes that Roche can meet demand expectations faster than anyone else because it is familiar with the challenging production process. To meet current orders, Roche has quadrupled production capacity since 2003,"