If you want a really good mudflap, check out the Duraflap ones. There've been a lot of discussions about them here in the past which I'm sure you can find by doing a search. As already mentioned, they can put the Airstream logo on the flaps as well, which although somewhat pricey, I'm sure would be as classy as you would find anywhere. Your post sounds like your looking for cheap, however, and in that case I'm not sure what you'll find.
The Enkay flaps are quite good too, as already mentioned, but the newer style, while lighter in weight, are nowhere as good as what they were selling 3-4 years ago -- I've owned both styles. If you are able to find someone who has a used set of Ekays from 3-4 years ago (perhaps from someone on this forum?) that would be the best flap for you IMO, but they do need to attach to a hitch bar, and are heavy.