Skip the fert lines. They are all fairly expensive and you pay for and to ship a product that is 90% water.
Make the jump to dry. Its not that hard particularly with the guidance of folks here on the forum.
Here is a link to a guy that sells on the forums here.
Dry Ferts Supplier
if you want to go half way, and don't want to bother with measuring and mixing yourself check out nilocg's premeasured diy liquid ferts kit in the link above.