The SweeTarts is an etailer that only sells individual tarts. They are all 1.2 oz., wrapped in plastic bag and poured in a cupcake foil. As of now, they sell for $0.85 each, which is pretty cheap. The turnaround time is only a few days. The owner, Summer, has made a little mistake in choosing the kind of shipping for my order so be sure to specify exactly what you want by going on the USPS website.
Here are the tarts I ordered: