looking for high speed buffer/ mux solution

Dear team,

we are looking for high speed Buffer and Mux solution for 28Gbps data.

Did we have 1:4/1:3 buffer solution?

Did we have 4:1/3:1 mux solution?

If we don't have 28Gbps solution, did we have 16Gbps mux/ fan-out buffer solution? thanks.

Regards,

Ben