Those are the only two sources that come to mind. I have had McFarlane fabricate a custom cable for an autopilot servo, it was a nice unit, but I though it was rather expensive when compared to their other cables. But what do you do. Note their custom cables are not PMA'd; if your aircraft is other than part 91, that could be an issue.
Can you provide an IPC reference for the 2 P/N you provided. That two numbers do not cross over to the Textron IPC. I looked at the IPC and found the trim cables but I am not sure exactly which cables you need.