Proton problem

Same thing happened to mine.

I put it back in the back and haven't even looked at it for over a year.

I even used a blow dryer to heat up the plastic and it still broke.

Use hot (not boiling) water and build a jig slightly smaller in diameter than the part should be when cooled.  Warm the plastic and bend it around the jig.  Dunk the whole thing into cold water while still attached to the jig.  When cool it should spring out slightly and end up right where you need it.  The jig is critical or you run the risk of twisting the part while trying to bend it.