You don't have many options other than an approach that uses JB Weld. You can't weld the piece back in place due to the tolerances in the IP.

As best as I can see, the broken piece is part of the housing of the IP, correct?

The screw does not have a lot of force on it, so, if you can get some good contact on clean surfaces, the JB Weld might do a good job for you.