I finally found where I can buy bulk catnip.
I found a place who sells 5 pound buckets:

Cosmic Pet Products
16014 Business Parkway
Hagerstown,MD 21740
Daniel Seidman
[email protected]
Cosmic Pet Products

They don't sell things on the site but she wrote and said she would on the 5 pound buckets of catnip.Probably other big items too.
But it's 47.25 and 5.99 shipping and handling to my home in Maine.
I thought it was a great deal so decided to share with you guys
I will end up giving some to friends of course.Don't want the cats going crazy