For these, they can generally be found at the grocery. Try and get the generic brand to save money.
For brown sugar scrub you just need conditioner and brown sugar. Get the granulated (non cubes) kind, which should be with the rest of the sugar.
ACV comes in big jugs--I just find it in my cupboard cuz my mom buys it.
Ingredients for DTs are like olive oil, bananas, honey, etc.
These I would reckon are only at WF. did you ask the staff?
For lavender spray your need essential lavender oil.
And for flax seed gel you need actual flax seeds. I've never actually made it meself, but I'm sure you could find the seeds if you asked someone at WF. they could probly direct you to another store if not.