Well Dave,I happen to collect swizzle sticks and have done so for many many years and have well over 20,000 of them(a bit compulsive yes??...lol).
These are not that uncommon and are usually seen with other sticks in bulk lots on eBay.
They come in different colors of course and,individually you MIGHT be talking $2-$4 each if you can find someone who is interested.Of course,on eBay,you never know who is going to bid and you might get more if you get that right bidder.