4 way audio switch

[Waffleness]

Hello,

Bit of a random request, but I thought i would ask anyway:

I need a 4 way audio switch that will accept 4 stereo inputs, and switch them between 2 stereo outputs. For example:

Stereo in 1 --> Switch --> Stereo 1 or 2 out
Stereo in 2 -->

Stereo in 3 --> Switch --> Stereo 3 or 4 out
Stereo in 4 -->

As you can see stereo 1&2 are seperate from 3&4, so I could just buy 2 of the same single stereo switch devices.

Im half thinking about building one and mounting it in a small box. I just dont mind paying for something that properly manufactured.

Thanks!