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I often find them at Wal-mart or Dollar Stores.

Also, I gave you a 100% upvote for making a comment that is actually interactive! Often they are called "balloon animal balloons" or "twisty balloons" but people who work at the store should know if they have them or where to find them.

Thanks @enjoywithtroy!

Thank you my friend!! I will look at Walmart.

I buy Qualatex from Amazon, 250 for about $18 shipped. I heard they were good and is what I use. I don't use them often, but I bring them out when we having parties and make swords and hats for the kids.

These are what I ordered, I'm almost out of the first pack but think I've had maybe 2 failures.
https://www.amazon.com/gp/product/B001DAYNYK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Way to be helpful! Thanks!