Yes you can do this. I don't know why Bali jumped your case, I understood completely what you are trying to do, that is to add a couple circular LNBs to your
Globecast dish to hook up to an authorized DN receiver.
It may take a bit of trial and error, and a few trips to the hardware store, but what you will have to do is mount the LNBs for 110, and 119 off-axis of your dish. Some dishes work better than others for this, but what you have in your favor is that the Dish satellites are high-powered so even the off-axis signals should come booming in with your presumably larger GC dish.
Since this board belongs to one satellite retailer, I won't give you an address on another, but if you google for "multi feed antenna systems", you'll likely find something similar to what you are after.