These guys out of Texas claim to have a warehouse or something in Indiana...might be worth checking them out.
Just checked out this site, not sure where in Indiana they are but this is what I got for one 75 gal tank from the section thats says "Indiana plastic storage tanks"
Shipping to a Commercial Address, Quantity of 1 : $147.93
Shipping to a Non-Commercial Address (Residence / Construction / School), Quantity of 1 : $207.93