As USDownlink said, these are encrypted channels. I assume you have a legal source for the needed receivers?
I believe that the DP Plus LNB is a Dish Pro LNBF for Dish Network. Circularly polarized and the wrong frequency range, so it won't work for you.
The channels you are looking for are in the 11,000 to 12,200 GHz frequency range and the polarization is linear. You also need a LNBF with an LO frequency that matches what their receiver is expecting. For example 9,750 or 10,750 GHz. So you need the specs of their receivers first, before getting an LNBF
For Monticello, Iowa, an EIRP level of about 35 dBW from 67W seems plausible. But you are outside of the footprint map, so that is extrapolating out from the edge, a very dangerous thing to do. A 250 cm Ku dish is not an inexpensive consumer item. You could spend thousands of dollars for one and then find it wasn't big enough.
For 50W the footprint maps show more like 47 dBW, not 33.7. If that is correct, you should be good with a 30 to 36 inch dish.
There is one unscrambled channel in the Claro mux from 50W, TBN Enlace. IMHO, if you are serious about this, get a 36 inch dish with a universal LNBF and a FTA receiver. Get some experience picking up TBN Enlace, then work up from there. If it doesn't work out for you, you will only be out a few hundred dollars, not the thousands that what you're proposing would cost.