Have you tried the Barbour collection? I don't know if the hard copy is more complete, but here's a link to a digital one. http://www.rays-place.com/town/new-london/index.htm
But I think it might be only for New London City. What about churches? You might try the County Clerk's office. My Douglass's where in New London in the early 1700s, and I found/ordered the entries for them through the clerk.
I don't suppose you have a Champion who married an Ellen Douglas b. Nov 1842 in IL do you?? I don't have a first name for him. or much else.
Julie in CA