Hi! Thanks for the photos. They were helpful!
That broken part is a transformer, listed as AKG part number 1650Z0165. It is identified on the schematic and board layout as U62 (or more accurately U "umlaut" with a pair of dots over it...) (see link for service manual below)
I saw on another forum that AKG/Harman had them as recently as 2012, and that same transformer is used in the C480B body, so there's hope that you can still get one from AKG.
AKG C460B service manual:
http://recordinghacks.com/pdf/akg/C460B-service.pdfHere's the contact information from 2012:
Frank Rodriguez frodrigu@harman.com
Phone +1 818 920-3279
If that doesn't work, try the current toll-free number for AKG Support to get through to the parts department: (800) 458-5534
It looks like the transformer attaches with 4 through-the-board soldered posts. If you can find someone (or yourself) that is *really good* with a small soldering tool, it's a DIY job.
Hope this helps!!
Best of luck!
- Randy