Where are you buying your AN from, and where are you located (roughly, I'm not asking for anything specific). The price can vary a lot depending on where you buy and where you are. Like AN tends to cost less in Canada than the US, and if you live in some places overseas it can be nearly...
If you've got more than one local hydro store try them all. They might all say no, they might all say yes (win!) or you might just get one yes. Whatever the case, it never hurts to ask.
I would also suggest sending an email/calling Advanced Nutrients themselves. If you call and they...