I spent a while looking at DVB-S2 modules from Comtech
They do a number of DVB-S / S2 modules. The modules
are controlled using I2C and supply their decoded data in
Transport Stream format using an 8 bit parallel port.
The modules consist of an RF to baseband down converter
chip which outputs IQ data which is fed into the decoder chip.
They use a range of decoders DVB-T,DVB-S2,ISDB-T
8VSB etc from a number of different manufacturers.