I've been ordering my supplies from globalsugarart for the last several years, but there are some things I can't seem to find on their site. 

So, what are some of the places that you all shop at?

ATry Cake Supply Depot. I just visited their store, and they have everything! Two really nice ladies who are very accommodating. They said to call if I didn't see it on the site.

I like Jester's Cake Supply, also known as Fondant Source:  http://www.******************/  They've been good with shipping times and usually have what I order.  

I know what you're saying about GSA.  When I can't find specifics I generally do a Google search for what I'm looking for.  Could be Sugar Delites, Fondant Source, Sweet Wise, SugarArtStudio - it just depends on what I need.  Do you have specifics you can't find?

Well you need to look around the directories on the internet. Also the yellow pages is an excellent resource for finding these suppliers.

Thanks so much for the suggestions! I am going to go look at some of these places right now.

Specifically, I am not able to find a cupcake box that holds 12 cupcakes along with the cupcake inserts for 12. For some reason I only see cupcake boxes for a maximum of 6. 

Thanks again.

I have a listing of cake decorating supply sources on my website.  Hope this helps. Liz.@ www.cakedecoratingclasseshq.com .

AAmazon has a lot of great supplies and often with good offers and with free delivery. When I am in Toronto I love icinginspirations.ca. Christie has great service and often great deals.

AI live cakesupply4u. Shipping is free for orders over $100. I find my fave icing (ck) there as well as fondant and tools. And the best part is they guarantee lowest prices

I always buy in amazon.com :)