I want to add a front disk brake to our 2005 T1000 so that means new wheels, front fork, and the disk brake. I'm already looking on:

e-Bay
Craigslist
Tandem Magazine - Classifieds
Road Bike Review - Classifieds
Performance Bike
Bike Nashbar
Colorado Cyclist
Bike Forums - Classifieds
Tandems East

Seems like now that we are in fall there should be all sorts of closeouts, but not many tandem specific items.

Are there any other places I should be looking?

I sure wish Supergo was still around...