I got mine from the uk rain forest site, but seems it's out of stock now.
For splitters, currently I am using 2x 8 way, and 2x 6 way in a daisy chain, different brands I think some are Antiference and some are SAC.
Lnb out - 8 way splitter - 7 tuners + 1 8 way splitter to 7 tuner + 1 6 way...