Thanks to their stupid marketing and bad labeling, I could never find real dual output LNBs on eBay.
no, No, N:rant:O, No, no!
If you want both polarities at the same time, go look at the
C2 LNBF with two actual outputs.
You can set one to vertical and one to horizontal (and use a multiswitch to feed multiple receivers)...or...
... or you could just hook up two receivers and be done with it.
The only other realistically priced alternative is the
B1 bandstacked LNBF (same link), but that's probably not for beginners.