Finding Sensory Agents in Dallas?

For my last set of sessions in Dallas, I'm doing a few that are about sensation and exploration- and I'm really hoping to find some of the things I need so I don't have to ship these things to my hotel.

Does anyone have a recommendation for where I can find (in downtown Dallas):

Fresh Ginger
Peppermint Oil
Cinnamon Oil

Actually- as I start to make the list... is there a whole foods or other organic co-op in Downtown... I've got more things I need, but everything that I'm not bringing with me would be there.

Thanks!

Dallas has a Farmer's Market near downtown...open on Saturdays I believe. There is a Whole Foods grocery store at Lemmon near the Tollway. There is a WalMart Food Store near downtown also. Been a while since I've been there, so you might wait for some native Dallasites to post. Also, for spice used in Mexican cooking (chilis, cilantro, etc.) there is a Fiesta grocery store across the river from downtown.

I find that Fiesta has the best selection of ginger root.