i use: http://trimweaver.com
for alligator clips and some appliques http://theribbonretreat.com
and here are some new ones i discovered that i haven't tried out yet: http://hairbowcenter.com
i ordered from them but haven't gotten anything yet [just ordered a couple days ago http://www.giftsintl-us.com
awesome prices for tulle and grosgrain [in my opinion]
although not as much selection of tulle as http://papermart.com
just to name a few!