Thanks for all the advice. Yeah, I figured replacement parts were hard to come since I couldn't find much online.

I have straightened the cages as best I could - both were bent and twisted. I decided to replace the derailleur cables at the same time, so we'll see how it shifts once I get the new cables installed. Good advice on the taking a file to the burrs on the pulley wheels.

Worst case, I'll pick up a new Ultegra for $80 from performance.