Get a 22khz switch and use it with 2- 4x1 Diseqc to get 8 sats., or a single 4x1 disequ switch and and a 22khz switch for just 5 sats. Recommend an Ecoda brand 22khz switch, since that brand passes Diseqc commands.
As Brent said, you could simply put any old 22khz switch on one input to your diseqc switch. That'd give you five intputs.
And I agree, the better idea is to get an Ecoda 22khz switch, and put it between two diseqc switces. That'll give you eight inputs. - Regular 22khz switches won't work in this mode. ( fine print: there are some minor restrictions if you are using Universal LNBs )
It's documented in our Switch FAQ; take a look through it for other ideas. -