HD3SS6126: Help Finding 2 Channel 2:1 switch for PCIe Gen3

Hello,

I was wondering if there is a two channel version of this device.

My customer only needs a 2 channel 2:1 differential switch. 

So basically:

The maximum speed it has to support for this project is up to PCIe Gen 3, so 8Gbps, but they will make a PCIe Gen 4 board when the ready, so 16Gbps.

Thank you,

Louie