I wouldn't think so. You'll usually find vendors selling Pods and other foods but usually not algae cultures. So, you're probably going to need to look at the list of vendors that are going to be at the swap and contact them directly and see if they can bring what you're looking for.
We will have live pods and live phyto available in very limited supplies. I strongly suggest that customers looking for these products pre-order to ensure they get what they need.