Someone on craigslist is selling 1972's volumes 13 & 15, 1973's volume 23, and 1974's volume 26. And it seems like they're still available because I don't see anything to indicate they've sold of the deal is closed.
WGN's promo video featuring Jonny Lee Miller, Lucy Lui, Michael Emerson, and Jim Caviezel as their characters meeting in a warehouse. Love the "beautiful and alluring partner" bit!!