Replying to HDPE available in Vermont?

Hey guys,
so basically I'm looking to build a box for backyard jibbin in the winter and I figuired I'd start now.  This year I thought I would take a step up from the pvc pipe and get my hands on some HDPE, which I heard is durable and worth it.  I'm aware there are places to purchase it online...but I'm wondering if any of you know where I could pick it up local (Burlington or central Vermont preferably).  Let me know if you have any ideas. thanks.