There are only two variations of this car sold in the United States so far. They come with either a 1.3L I4 engine or a 1.5L I4 engine. Both models are two wheel drive. In some other markets, including Japan, they come with 4 wheel drive optional.
Transmission options include 5 speed automatic or 5 speed manual. There is also the more expensive CVT transmission. This continuously variable transmission allows for gearless shifting or shifting via paddle controls.
Whether you are looking for the base model Fit or the Sport version, your best bet is to go straight to a Honda dealer. Very few of these are going to be showing up on the used car market any time soon, especially considering Honda's reliability record. You might be able to find a few dealers selling them on eBay, which will often get you a better price. If a local dealership sells on eBay, that might be your best option.