Would need a standard Ku LNB with LO of 10750 or a universal LNB LO 9600-10600 and probably a min 36" dish. As DTV LNBs are usually LO 11250 and are circular.
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Are you planning on using an old DirecTV satellite dish for reception? If so, it will require removing the original lnbf and installing an lnbf like the one I mentioned above so the front of it is positioned exactly where the removed one was pointed. Not the easiest thing but it can be done. The Slimline dishes are great for 97w. I have modded those myself, can't comment on usability of any of their smaller dishes.
If you mod the dish you will need a mounting bracket as well. Casey from Hypermegasat sells those and he is great to deal with too.
Use this LNB Bracket to add a LNB to any Directv dish, Dishnetwork Dish, ORBY Dish, Super Dish, and 33", 36", or 39" FTA Dishes. 30 mm & 40 mm LNB holder to fit just about any Ku LNB. Fits Standard/Universal FTA LNBs, most Dishnetwork and Directv.