ICEPower based integrated Amp

I recently got the parts for a ICEPower 200ASC Dual Monoblock amplifier. A little while ago I finished building Rod Elliots P05 and P06 phono stages. Ive been thinking about combining these boards plus a RaspberryPi based DAC and input selector into one chassis.

The current hangup is the input selector, tape loop and bypass. I would like to have three auxiliary inputs, one tape loop and one amplifier bypass to output to my seperate tube-based headphone amplifier. Are there any PCBs out there that could accommodate something like this? Or am I going to have to design something myself for this project?

I currently have a Pioneer SX-550 which I really enjoy. Im hoping to build everything into a similar silverfaced chassis, something that resembles the Pioneer SA- line of amplifiers from the 70s.

Let me know what you think!