You could easily pair 2 4output diseqc swithes using a relay switch.
The first 4 satellites will be output 1 of the relay switch, the next 4 satellites will be on output 2 of the realy switch.
search for spaun relay switch on google
Go for model SUR 211F
Works nicely when you cannot get an 8 output diseqc switch.
There is a 4 output reay from spaun as well as a 2 output.
here is an example of the setup:
First 4 LNBs
Configuration Mode = advanced
Satellite = Hotbird 13E
Voltage mode = Polarization
Tone mode = Band
LNB = LNB 1 … 4
DiSEqC mode = 1.1
Toneburst = None
Committed DiSEqC command = AA, AB, BA, BB
Fast DiSEqC = Yes
Sequence repeat = Yes
Command order = uncommited, commited, toneburst
Uncommitted DiSEqC command = Input 1
DiSEqC repeats = none
LOF = Universal LNB
Increased voltage = yes (if wire is long)
Polarity = Auto
Tone Amplitude = 800mV
Next 4LNBs
Configuration Mode = advanced
Satellite = Badr 26E
Voltage mode = Polarization
Tone mode = Band
LNB = LNB 5 … 8
DiSEqC mode = 1.1
Toneburst = None
Committed DiSEqC command = AA, AB, BA, BB
Fast DiSEqC = Yes
Sequence repeat = Yes
Command order = uncommited, commited, toneburst
Uncommitted DiSEqC command = Input 2
DiSEqC repeats = none
LOF = Universal LNB
Increased voltage = yes (if wire is long)
Polarity = Auto
Tone Amplitude = 800mV