On Tue, 29 Jan 2013 07:44:44 -0600, Moe DeLoughan wrote:

soda syrups ... local restaurant/bar supply stores
caffeine citrate ... drugstore.
citric acid ... beer/winemaking shops
Vanilla extract - obviously, candy/baking suppliers
common food oils (orange, cinnamon, lemon) ... easy to find
coriander and nutmeg ...steeping nutmeg and coriander seed
Neroli oil ... you'll probably give up on using that one.
Caramel coloring ... candy/baking suppliers

Looks like I have a bunch of suppliers to look up!
Thanks for the comprehensive suggestion.