There isn't much Ku-Band Free to Air at 91W. A larger
C-Band dish and LNB will give you something to watch there.
I can think of only one full time Ku FTA channel at 110W and another that is variable. Nothing C-Band there. A bit more on 119 Ku, but not much.
How close is Google Maps?
Google Maps
Have you considered a proper FTA dish and motor, or even reviewing the
rules?