. . . and for anyone who may read this thread later, the original LNB, marked with the FSS sticker, would work too.
LO is 10750, but it's bandstacked.
There are some models with tall oval horns, which may match the wide elliptical dish a little more optimally.
...well, after 20 minutes looking for this picture on the forum, I've decided to just post it again.
it's the tall oval feedhorn mentioned above.