Plan B seems expensive for one use. Is there a cheaper version?

There are a bunch of generic types of levonorgestrel-based EC pills for sale without a prescription over the counter or online. Generics are usually cheaper than brand names, and the cheapest alternative we know of, AfterPill, is only $25 including shipping. Note that AfterPill doesn’t offer expedited shipping, so you have to order it in advance, not after an emergency!