Thats a tough one.
You can lurk on Ebay or similar sites hoping to find someone parting out an 802, but that doesnt happen that often. My other suggestion would be taking a look at dxzone.com or similar Ham sites for Ham operators that do repair or even posting your same question there. A lot of the guys over at dxzone and alike are at the level of obsession that they dedicate a garage to just parts. You might get lucky that way.
Radio repair - Shopping and Services: Radio Equipment Repair