I have bought thread from Superior thread Co. they are in Utah and also go to shows.
Shoppers rule I have also gotten thread,accucut-go dies,thread heavens all sorts of things. it is like a barter system you make them a offer and they will get back to you if they will accept yor offer or tell you the least they will take. shoppersrule.com
also I have gotten thread and you name it from Kenssewingcenter.com from Muscle Shoals Al. 1-877-536-7739
They are great help just ask.
Also I have gotten fabric from MaryJos.com in N.C. They will call you if they are out of stock and then if they get it back in they will call and ask if you still want the fabric. They have a good selection of Batiks if you need to find a certain color etc.
Have fun. Kathy kjym