I'm not sure about getting the cables. I've made my cables for a while. Just use 50 pin ribbon cable and a 50 pin connector.
I cut off the connectors and split the cable to make it 44 pins.
You have do modify one of the connectors. You have to take one of the connectors apart, remove the cable. Next, the small flat pins in the connector can be removed with a pair of needle nose pliers, and then flipped. The pins are offset to one side. Reversing the pins solves the IO cable problem. Replace the cable (I manually press the cable into place with a pair of duck-bill pliers).
I don't know if your cables or connectors will be the same...but this works for me.