I got a pair of fancy Buddyflaps installed. They work OK. If they wrapped around the tire a little more, they would be better. I think that they were about $15. I also purchased a pair of PB flaps as described in previous posts. They seem like a good value, but I have not mounted them yet.

If you need more than one set, it makes sense to start making some. They are easy to do.

The buddy flaps: