In that case, obtain a bracket and single linear lnb like shown:
You should be able to find the holder and lnb at your local FTA/satalite dealer.
There are 2 neck sizes, 30mm and 40mm.
Make sure the LNB and holder match or have adapters.
Preset the Linear LNB SKEW for your area.
Then do your azimuth and elevation and good luck.
If you can't find an authentic *C LNB, then the spec you want is:
KU 11.7 to 12.2 GHz with a local oscillator of 10.750 GHz and LINEAR Polarity.
You'll only be able to point to 1 SAT (F1 or F2) at a time.
Just observe when deconstructing the original you take note of the distance and angle back from the dish the FACE of the original LNB and then ensure your new one matches that as close as possible.
With a little luck, no changes to angle or focal length are required with the bracket.