better choice of LNB:
Here is a picture one of members posted a while back.
It shows the stock feedhorn removed from a Dish Network FSS LNB, and replaced by the feedhorn of an oval Primestar dish.
(Standard 10750 LO, but bandstacked)
Since the dish keeps its matching feedhorn, most any bolt-compatible LNB can be tested.
Advantages: does both polarities, easy to obtain (just ask), bolt-on compatible (likely).
Disadvantages: bandstacked, may not fit (see above), you don't have one.
edit: Second picture added.
Same feedhorn bolted to a regular voltage select LNB.
Advantage: does both polarities, easy to obtain, bolt-on compatible (same as above), not bandstacked if you care.

Disadvantages: may not fit (see above), you don't have one.
