Hitch mounted mud flaps/splash guards

Looking to get a rear flap to mount on hitch to protect trailer. I have extra long flaps on the truck but would like extra protection for the new trailer. We borrowed a "brush" style from my uncle with our 26BH and it did very well on keeping trailer clean and protected. Did a little searching online but seems the flap style is more prevalant. Opinions or recommendations on style and where to purchase for best price is appreciated. I also need to keep in mind that big Duramax pipe hanging out back. Thanks.