I have a client (currently PR0) who's KW & KW Phrases only have an inventory of 145,000 on G. Most of the top five sites are major TV shows that showcase this widget service on a segment once a year. My question is this. There is very little in the way of real sites with any PR that would be willing to exchange links. The big sites will not and all these horrid mom and pop sites that are mostly made up of a free home page site are all PRO's, where can I source some good links?