There is a supply store over near the VA hospital. I can't remember the name of the store but it's a "paper" type store. It's in the small shopping center on the left if you are going towards I-77 (VA hospital on your right). I wish I could remember the name of the store. 
Anyway, it's a small place and doesn't look like it's got cake stuff but in the back she's got all kinds of stuff. Don't know about fondant because I've only been in there once and didn't know what fondant was. 
Good luck.
Unfortunately there are not a lot of cake supply stores in the Columbia area. Chocolate Wonderland is a cake store but it is about 15-20 mins outside of Columbia in Lexington. They are a little pricy though. I find it cheaper just to order off the internet. I have never heard of the one Gatorfan01 suggested but I would like to go see what they have.
Have you ever tried making mmf?
If is was sticky, you needed to add more powder sugar.
I live in Orangeburg. "If It's Paper" has cake supplies as well. They don't have fondant though. I met this lady that's a chef in Columbia and she's about to open a supply store, she offered to order products for me since I can't find them here. I could ask her about Satin Ice and HRS if you'd like.
Oh that would rock! Thank you blessedist, does she know about when it will be opening?
Think the one Gatorfan01 was talking about is Cedar Terrace Card & Party Shop on Garners Ferry. Haven't been there in a couple of years, but they did not have fondant when I was there last. There was a new vendor at the last ICES DOS I attended a couple of weeks ago from the Greenville area. Good prices, and he ships same day on orders received by 4PM. Still have to pay shipping unless you want to drive over, but it would be next day delivery for you. He had all the new Satin Ice stuff at really good prices. Check out "cake supplies 4 u dot com" no spaces or quotation marks, of course 
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ibmoser I didn't even know we had ICES DOS! :] I have checked out the cake supplies 4 u but I couldn't find anywhere to actually contact him! Am I looking right past it? Thank you so much!
JaeRodriguez - look at the bottom of the home page - there is a "contact us" link there with all the info. SC ICES is amazing - a very friendly, active group with great quarterly DOS and classes by talented artists twice a year. Check out scices dot org or PM me if you need contact info.
Is there a Michael's near by? Michael's carry Duff Goldman's fondant in red and black. They work great and I was very pleased with the outcome. Check out the graduation cake in my photos with the red and black decorations. And don't forget to use your Michael's coupon to save money 
Thank you ib- I will definitely look into it! And I did try duff's, it was great just expensive!
Thank you Emma37! I will definitely head out that way! It's great to hear there are other SC decorators on CC!
I"m also glad to read this info and glad to see other SC CCers besides you Jess! lol Glad to know about ICES! Def going to look into that
Haha, I was wondering if you found this thread yet! Did you know about the place on Garner's Ferry? I think I might go out there today!
yeah i've known about it, havent gone yet, but I have been by it when I would go with my parents to the VA. I need to get a few things for cakes for the month, so if you do go let me know what they have and if its worth driving there
Emma37- Thank you SO MUCH!! She had hi ratio shortening! :] And so many more tips then anywhere else I've been!
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