Well, it seems you should look for some 90grad shaft extenders, but I do not have such things in mind.
I also had such problem when tried to use the JH PCB in my gear. I changed things radically: use my own pieces of PCBs to manage input impedance and gain. I mean I use one PCB right soldered into input RCAs with enough relays to switch the impedance and another PCB on top of the Piccolo PCB (in place of removed switches) with just the relays and resistors to switch gain. A simple switches at the front made the right relay switch on, just all. It worked for me.