I believe the adapters you are looking for are B-Band. I had DirecTV send me three of them and have used them for four years with an HR-22 and an HR-24. I recently bought a King Flex automatic antenna. The Flex does not receive DirecTV in HD. I tried the Flex with two DirecTV boxes and found that the directions for the Flex were incorrect. I was told not to use the B-Band adapters with the Flex but got no picture when I tried. Adding the adapters brought me a nice, clear if SD picture. If DirecTV will not send you free adapters buy them from Amazon.
It all depends on who answers your DirecTV call. Some of their customer service tech support people haven't a clue.