Help! Where to find denatured alcohol and aquamira inside Tetons or Yellowstone Park?

Next week I am flying into Jackson in the evening and staying at Colter Bay Cabins (45 mins. north of airport inside Tetons park)before heading into the backcountry in Yellowstone.

I need to find a place north of the Jackson airport where I can buy denatured alcohol and aquamira drops.

I called the folks at the Colter Bay General Store and Gift Shop and they said they did not have the alcohol. I did not ask about the aquamira.

Anyone hang in this area and can help me with where to go?

Brendan