Can the part be molded or 3D printed ? I've had some success repairing plastic stuff with a very thin hole drilled in both broken parts, a metal stick like a large wattage resistor leg and some appropriate glue.
Last time i needed these i picked up a junk calrec module from dan alexander. Was like 80 bucks but got a few other parts as well. Which one do you need? The far left one? I can look and see if i have any but i might forget to lol