We do have Funderburks from Dorchester, ILL in our Weeks family line. You may find info to help you on our Weeks forum, we have marriage info, census etc. for Macoupin/Madison Co, IL. The allied family area, has the Funderburk surname.
I'll warn you, have an ad/pop-up blocker on when visiting the ez board site. It's loaded with ads, but if you use an ad blocker, it is worth it for the info there.