Assuming your dish is pointing at 28.2 you could do as I have and add the Ross LNB along side your existing LNB and pick up both Astra 28.2 (Freesat etc) and 19.2, its surprisingly easy to do. Use one feed to each of your Ross boxes.
I decided to do this instead of buying a second dish.
DSCF3820 by
keicar1, on Flickr