Maybe you should try searching for Tom COBURN, as that is his name.
Thanks. I just figured that out myself. Apparently I'm not the only one to have problems with the "L." After reading a bit of Brad Carson's site, I noticed it mentions Tom Colburn--with the L--several times. Perhaps that why the search results are skewed to Carson.
Since my post I've managed to find Tom's web site:
http://www.coburnforsenate.com/
Thanks again BigB!