I FOUND THE MAGNUM CAPS AT SCHEELS!!!
They have had them all along, 3,000 of them! But they are $9.99/100 now.
I ran into a very smart young lady today and she asked "You finding everything?" I told her No, web site says you have them but you dont, said "Yes we do..."
Turned out she happened know that the #11 mag were Hidden upstairs in a plane unmarked brown box!?
So, if you can't find #11mag caps then just ask for Micheal, Pet Supply Manager, she know where the 'new kids' are hiding them!!
(Sneaky so-and-so kids!!)